For safety and stability, air springs are the perfect partner for your rear suspension when you are hauling heavy loads. Springs fit inside existing coil springs to help level your vehicle, improve braking and handling, and reduce tire wear. Lowest Prices for the best vehicle suspension from Firestone. Firestone Coil-Rite Air Helper Springs - Rear Axle part number F4138 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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VIDEOS
Video install firestone air helper springs 2012 kia sedona f4138

Firestone Coil-Rite Air Helper Springs Installation - 2012 Kia Sedona
Video install firestone air helper springs 2009 kia sedona f4138

Firestone Coil-Rite Air Helper Springs Installation - 2009 Kia Sedona

Firestone Coil-Rite Air Helper Springs - Rear Axle

Firestone Vehicle Suspension

(115 reviews)


Code:   F4138

Retail:$137.54

Price:$104.65


Custom Fit Product

Shipping Special

Shipping Weight: 2 pounds

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Firestone Vehicle Suspension - F4138

For safety and stability, air springs are the perfect partner for your rear suspension when you are hauling heavy loads. Springs fit inside existing coil springs to help level your vehicle, improve braking and handling, and reduce tire wear.


Features:

  • Provide extra support for your existing rear coil springs
    • Fit inside existing coil spring suspension on your vehicle
  • Keep your vehicle level when you are hauling a heavy load
    • Improve steering control and balance
    • Level your headlight beams
    • Reduce tire wear
  • Maintain even load distribution with air pressure, leveling off-center loads
    • Air bags adjust manually, side to side, with individual inflation valves
  • Enable more effective braking and handling
    • Work under heavy loading and adverse road conditions
  • Increase stability to promote a smoother ride and prevent bottoming out
  • Made of durable, elastic polyurethane for years of comfort and stability
  • Include all materials necessary for installation
    • Brackets, air springs, hardware, air line and separate valves for manual inflation
    • Switches and gauges, compressors, and air tanks (sold separately) are available for quick and easy air spring inflation/deflation from inside your vehicle
  • Made in the USA


Specs:

  • Load-leveling capacity: at least 500 lbs (at most 1,000 lbs)
    • Coil-Rite springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
  • Adjustable air pressure: 5 psi to 35 psi
  • Limited lifetime warranty on air springs
  • 2-Year limited warranty on hardware


Firestone Coil-Rite Air Spring Basics

Firestone Coil-Rite springs fit inside your existing rear coil springs to maximize the effectiveness of your suspension system. The added cushion provided by the air springs allows your vehicle to better handle a heavy load or trailer. Hauling heavy loads or towing a heavy trailer can make the rear of your vehicle sag and the front end rise. This puts more strain on your rear axle and reduces contact between your front tires and the road, causing problems with braking, steering control and traction. By adding air springs to your rear suspension, you can help to level your vehicle for more effective braking and handling under heavy loading or when you encounter adverse road conditions. The air springs also help to level your headlight beams and reduce wear on your tires.


Firestone Coil-Rite airline installation

Adjustable Air Pressure

The air pressure in your Coil-Rite springs can be adjusted manually, side to side, to compensate for off-center loads. A centered load improves the stability of your vehicle by reducing body roll. The air springs will also help to absorb road shock and soften contact between your axle and frame. This prevents bottoming out, thus improving ride comfort. Route the air line tubing for the springs to your vehicle's bumper to provide easy access to the manual inflation valves.


Firestone Coil-Rite air spring components

Air Spring Construction

Coil-Rite springs are constructed of durable, elastic polyurethane to ensure years of service. Single replacement springs (sold separately) are available for maintenance to an existing Coil-Rite kit.


Air Spring Installation

The Coil-Rite springs install inside your existing coil springs. The custom-fit springs attach to your vehicle's spring seats.



4138 Firestone Coil Rite Air Bags - Rear Axle



F4138 Installation InstructionsInstallation Details F4138 Installation instructions

This Product Fits The Following Vehicles

2007 - 2009 Hyundai Entourage

2001 - 2004 Acura MDX

1999 - 2004 Honda Odyssey

2003 - 2004 Honda Pilot

2006 - 2016 Kia Sedona




Video of Firestone Coil-Rite Air Helper Springs - Rear Axle


Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.




Video Transcript for Firestone Coil-Rite Air Helper Springs Installation - 2012 Kia Sedona

Today on our 2012 KIA Sedona we're going to review and install the Firestone Coil-Rite Air Helper Springs, part number F4138. Now with the manufacture installed springs and no weight in the vehicle we measure from top of the wheel well down to the ground, we have thirty and a half inches. Next we're going to go ahead and add some weight; now with approximately four hundred and fifty pounds of weight in the rear of the vehicle our ride height has gone down approximately an inch and a half. With that kind of weight and losing that much ride height is going to cause the rear of the vehicle to sag. Let's go ahead and go through our test course and see what it looks like. As we go through the slalom portion of our test course we can really feel the body roll and lose the steering feel, because the front end is pointed up with the backend sagging. Now if we go over the alternating bumps it's really got some up and down movement and sways side-to-side. Now we'll go over a single bump, simulating a speed bump or curb and as we go over the bump we really feel excessive jounce and rebound because of the weight. All right now with air in our Coil-Rite Air Helper Springs, we brought our vehicle back to its correct ride height.

Let's go back to our test course and see how it does. As we go through the slalom course, while there is still a little body roll it's pretty much taken care of the majority of it. Our alternating bumps that can simulate potholes or debris. Then our single bumps that will simulate a curb or speed bump; as we go over it it really helps control the jounce and rebound bringing our safety and ride quality back to driving. Now here's what our Coil-Rite Air Spring kit's going to look like once it's installed. We've got our two easy to use inflation valves, one for the driver and one for the passenger side.

The inflation valves and airlines connect the main body of our springs here to the airbag. The airbag will fill up with air creating a pocket here inside the coil spring that's hard to compress keeping the vehicle at its correct ride height. Providing a convenient way to support the vehicles suspension and still providing a safe and quality ride. These are typically use on vehicles that get loaded down for a vacation or maybe they're towing a boat or camper to help support the manufactures suspension system. Now let's go ahead and show you how to install them. Now to begin our install we need to lower the rear control arm.

We're lowering the control arm so that we can get the coil spring out and install the airbag. There are a couple of ways to lower the control arm; you can remove the bolt here at the knuckle or here at the frame. For this application we're going to do the one here at the frame; so the process will be to loosen the bolt of the knuckle, remove the bolt at the frame and slowly bring the control arm down. Now if you're doing it on the ground or on a rack that's supporting the weight of the tires I recommend to put a jack or something under the rear of the vehicle to pick it up and take some of the weight off of the spring. Then we'll go ahead and start removing our hardware. Now to make it easier to loosen our bolt here and remove the nut and bolt here I'm just going to use a little spray lubricant on the threads.

Now with the nut removed but the bolt still in place we're going to put a jack underneath the control arm; because there's a lot of pressure here with the spreeing still pushing down in the control arm. Now with my jack in place we'll go ahead and remove the bolt. There's still some pressure on there; so we're going to go ahead and use a ratchet to thread the bolt out. Now after we removed the bolt we make sure we hang on to all the hardware as it will be reinstalled. Now with our bolt out we'll go and use the jack to slowly lower the control arm to take the pressure of the spring. Note before I remove the spring from its position I'm going to mark the orientation. This will make it easier to get it back into place. Using a paint marker I'm going to mark the spring seat, rubber insolatetor and spring. This will just help me to get it back in the correct orientation when we put it back in place. Now with all of the pressure off of the spring, we'll go ahead and remove the jack and bring the control arm down and set the spring out on the side for now. Next we need to remove the manufacturers jounce bumper, the bumper will simply come out of the cup and then we'll unbolt the cup. There's one bolt here in the center that holds it in place. Go ahead and set the cup aside as it will not be reused; but we'll hang onto the bolt as it will be used to install the new air spring hardware. Next we're going to drill a hole here in the lower control arm, this will be so that the airline can get routed up into the airbag. When drilling your hole I recommend you use a small pilot bit and work your way up to the final size. We're just going to drill it in the center of the spring seat. Now with our hole drilled out we're going to install the airbag support. The airbag support gets bolted where our old jounce stop was. Now to secure the support we're going to use the old bolt and add a flat washer. Go through the cup and back into the old jounce stop fastener. Once we have that in place we'll just tighten it down. Next we're going to collapse the airbag so it fits inside this frame. To do that we'll prep it by cutting off a section of hose, three to four inches long, using the Firestone tubing cutter part number F9009. This will give us a clean square cut on our hose without crimping or damaging it. Now once we have our piece I'm going to go ahead and put it directly into the airbag, and to put it in you firmly press it in and pull back to lock it in place. Now we'll collapse the airbag, install the airline plug and that'll keep our airbag smashed until we get it place. As I slide it into the spring, we'll make sure that it goes at least half way down. Then we need to remove the airline and plug. To remove the airline we're going to take an open ended wrench, push down on the collar around the fitting and pull the airline out. This will allow air back into the bag and it goes back to its original shape. We now need to take the airline and rout it through the control arm. We'll go down through our pre-drilled hole and out the manufacturers pre-drilled hole. Just to help guide the line into place I'm using a small pitch. Note you'll see here where we're kinking that section make sure we cut it off as we don't want to kink, distort or crimp the line. We'll now take our prepped coil spring, line up the airbag with our airline and put it into place. Again as we put the airline into the airbag we'll firmly press it into position and pull back to lock it in place. Now as we put the coil spring back into place I'll bring our control arm back up into position and reinstall the hardware. Now it maybe necessary to use an alignment tool just to get your control arm to line back up and put your bolt back in place. Now once we have the control arm lined up we can put our bolt in and install the nut. We'll then go ahead and take our jack out and any tools needed to line it up, putting the weight down on the vehicle. Now with all the vehicle weight back down on our spring and control arm we'll go ahead and tighten down the two control arm bolts. Now with our driver side done, we'll go ahead and repeat the same process on the other side. Next we need to rout and secure the airlines. Now to secure our airline and placing valves we're going to use the TrailerMate electrical bracket that'll bolt directly here to the bracket on our hitch. This is TrailerMate part number TM76471. Now I'll use the hardware supplied with the bracket to secure it here to the hitch. Put the two bolts in place, our bracket and the two nuts and we'll tighten them down. Now once we have our bracket mounted we're going to use the pre-drilled holes, open it up large enough so that we can install the inflation valve. I'm going to be using a five-sixteens bit. Now once we have our holes drilled out we can go ahead and install the inflation valve. By the valve, got a flat washer go through the bracket where we'll install a second flat washer and then the nut. Once it's in place we can go ahead and tighten it down. Now with our first on done we'll go ahead and repeat the same process here on the other side and then start routing our airlines. All right now as we're rout and secure the airlines we want to make sure we stay away from moving components, such as steering and suspension or excessive heat such as exhaust. Now we're secured to the lower control arm which is going to move so we need to account for that, we'll leave just a little bit of slack which gives it plenty of movement while keeping it away from the exhaust. To secure it we're going to use some zip ties. Now I can take both airlines and rout them up towards the front of the vehicle. Note you want to make sure you keep the airlines marked which side is the driver and passenger side. For this application if I hold the lines together the passenger side I a little longer. Now on this application I made a little zip tie, our airlines off to a previously run wire, but if your application doesn't have a wire to secure it to you can add your own Redline Metal Loom Clamps, part number A0500 that'll help hold and secure your airline. Just like we did at the airbag we'll take our airline, cut the length, slide it into the back of the inflation valve and then pull back to secure it in place. Then we can go back and cut of the excess from out zip ties to clean up the install look. Now with everything installed we're going to go ahead and check our airline connections. To do that we'll supply air to the inflation valve and then check our fittings. To check the connections we're just going to use a soap and water solution, we'll look for bubbles that can indicate an air leak and identify any problems. Now with our air springs installed we're ready to hit the road. There you have it for the review and install of the Firestone Coil-Rite Air Helper Springs, part number F4138 on our 2012 KIA Sedona.


Customer Reviews

Firestone Coil-Rite Air Helper Springs - Rear Axle - F4138

Average Customer Rating:  4.4 out of 5 stars   (115 Customer Reviews)


For safety and stability, air springs are the perfect partner for your rear suspension when you are hauling heavy loads. Springs fit inside existing coil springs to help level your vehicle, improve braking and handling, and reduce tire wear.


- F4138

by: David Bordne08/12/2014


I have a 2003 Acura MDX with 197k miles on it. I have used it for towing a 6x12 trailer for 3 quads. I have also towed many loads of dirt, mulch you name it. The rear sags allot and I just bought a 19' boat. I found this kit on etrailer and ordered it. The box came and it said it was for a Honda Odyssey. I double checked online with various sites and confirmed that all Acura MDX, Honda Pilot, Honda Odyssey, & Honda Ridgeline all have the same coil spring suspension with bumper stops inside the coil. I found a great forum which included pics of someone else that installed similar kit. I used those as references to install mine. Here are the steps to install which took about 2 hours: 1) Jackup car, and suppored with good jack stands 2) Removed tires 3) Using a 7/8" hole saw and made a hole in the middle of the lower control arm. 4) Filed the burrs 5) Installed a 7/8" grommet (not included in kit, I got this a local ACE hardware store) 6) Removed bolt from lower control arm knuckle to lower the arm. 7) The bolt for the bumper stop is not accessible, so I used a hand saw and cut about 2" of the rubber stop out. 8) Compressed the air bag and installed the plug (supplied) to keep it compressed, inserted the airbag thru the coil. 9) I deviated from the instructions which says to use the included plate at the top of the airbag which requires removing the bumperstop. Instead I placed this at the bottom of the airbag, which nicely has a grove in the middle which allows the connection for the airtube to sit in and keep it protected. 10) I routed the airline thru the factory openings in the lower control arm & rear end and up thru the trailer harness opening into the rear compartment in the trunk where the head rests go for the third row. 11) Reattached the lower control arm 12) Install tires 13) Lowered car 14) Inflated the bags to 15 psi which returned the truck to just a little above the stock height. I must say this is exactly what I was looking for. I towed the boat this weekend and didn't sag at all, the ride was much smoother then ever. Even with nothing attached to the truck, the ride is much better. My opinion is that this should be installed for anyone that uses the third row seat, or tows anything at all Acura MDX, Honda Pilot, Honda Odyssey, & Honda Ridgeline as it eliminates the typical rear sag! 146221



- F4138

by: Carl L06/25/2016


Most challenging to install. Not snap fit. Removal of several components and careful routing of delicate air line also had to purchase grommets for holes where chaffing of air line would occur. Don't expect longevity. Suggest development of a single support spring assembly to be better engineered and increase longevity, reliability, and ride stabilization as well as load capacity. Rusted parts don't disassemble with out heat and air tools. New bolts washers and nuts should be included. Thank you 265078



- F4138

by: Jeff I.07/22/2013


Kit has made the ride in my Honda Odyssey overall better. Also keeps the back end from sagging to far when I've got the trailer on. Quality parts (stainless steel valves and valve caps) easy instructions and it fits perfect. Only drawback was that I had to have my mechanic install it, but after talking with him he said that it would have been a challenge without a lift. 90923



- F4138

by: Michael D.07/17/2014


Have not installed it yet but I will follow up when it is installed. Great ordering experience and all was as described on website. 141733



- F4174

by: Bob K.08/10/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The product is not exactly as pictured. The bottom protectors are disks (round) rather than rectangular. But that doesn't affect their installation or performance. Installation was a bit of a challenge. I'm not a gear head, so I was lying under my 2008 Rav4 trying to jam the bags into the springs. I started on the driver side. It went fairly well. The passenger side was a different story. The exhaust system was in the way -- good thing it was coolish. I did manage to get both bags in with all my knuckles still intact. The instructions indicate that you cut a short piece of hose, insert it into the bag, deflate the bag, and insert the plug in the end of the short tubing. That's fine... but then when you get the bag in, it says to remove the short tubing. Ummmm.... how!?!?! I did manage to get the tube out of both sides. I'm not sure, but I think I may have buggered up the quick connector in doing so. The second to last step is to run the tubing to the back of the vehicle. I'm not too sure I've done a great job running the tube. Since the tube sticks out the bottom of the spring and arm, it seems there is no way to get the tube so that it's not dangling down from the car. On the passenger side, the exhaust system is very close to everything. It was hard to find a place to run the tube that wouldn't be too close to the exhaust pipe. Then you need to check for leaks. My unit's max pressure is 35psi. I inflated it to that, and quickly heard hissing from one side. I removed the quick connect inflator and reinstalled. Still with the hissing. So far, I haven't been able to stop the air leak. But... they stay inflated at 25psi. For now, that's okay for my application. Then you're supposed to drill 2 holes in your car. I don't think so.... I left enough tube that I can decide later where to install the inflators. For now, they're zip-tied to the hitch bar. I plan to get a piece of metal that will attach to the hitch's mounting plate, and drill through that instead. I haven't been able to tell if they perform as advertised. I just finished installing them earlier this evening. I took it out for a test drive (just to make sure I didn't mess up anything). Inflated at 25psi it seems to drive fine. I can't tell if the back end is firmer.... or if I'm just sensitive because I'm aware of the bags being in. It does appear that the back end rides higher (even when it's empty). I'm loading up in the morning and heading out. I'll update my review with performance observations when I get back. 94306


Comments

Use a concentrated soapy water solution in a spray bottle and start check the areas where the hiss is coming from. If you have an audible hissing sound, it will not hold pressure for long and you do not want the coil springs to be moving on a flat bag.

Patrick B - 08/10/2013

1877
Comments

Thanks for the awesome customer support.Making a fresh cut on the inflator end helped. The hissing has stopped, and no more leaks have been detected.I just got back from the maiden road trip 350 miles round trip. Its certainly not a long road trip, but it was enough to notice the dramatic improvement.Normally, when I attach my travel trailer 3500 GVW my Rav4 with tow prep option sags in the back. My trailer has the weight distribution kit that helps level it out. But, it only helps with the trailer weight. When I carry SCUBA equipment in the back of the Rav4, it still sags, and the weight distribution kit doesnt help with that.But... With the F4174 Coil-Rite air springs, there is very little sag. In fact, I was able to attach the trailer without much sag at all before I attached the weight distribution bars. With the SCUBA gear in back, the Rav4 stayed level no visible sag.In fact... the hole towing experience was dramatically improved. The ride was a lot smoother. There was a lot less galloping. I hardly felt the bumps on the road.Im surprised that Toyota doesnt offer this as an option. That such a simple and inexpensive alteration could make such a dramatic improvement is really surprising.I would like to change my rating to 5 stars.

comment by: Bob K - 08/12/2013


1888

We are glad to be of help. Remember to check the tongue weight rating of the RAV 4 in the owners manual. The tongue weight of the trailer and any cargo in the RAV 4 behind the rear axle will count towards that capacity. The air springs working with the weight distribution should make for a much better ride and your RAV 4s suspension will certainly thank you for it.

Patrick B - 8/14/2013



Comments

The good news is... These are awesome and should be available as an option from the factory. With the back end loaded and the trailer connected, the rear of the Rav is still off the ground. It also improved handling as the front end stays on the ground.It turns out that I hadnt buggered the quick release. I had just cut the hose at an angle. You need to make sure you cut the hose square. After cutting the hose square, the bags stay inflated without hissing.The Bad news is... if you have work done around the exhaust system requiring a cutting torch, you need to be careful and have some sort of shield to protect the bag and hoses. I discovered this the hard way. A small piece of molten metal cut through the bag like butter.But, for some reason, putting the 3rd bag was easier than either other the first two.I wound up attaching a small piece of angle iron to the hitch bar. This worked very well and avoids cutting the hole in the car.Having the tubes dangle from the bottom of the car hasnt been a problem. I was able to tighten them up a bit and route them better once the angle iron was installed.This has made a big difference

Bob K - 02/09/2015

9396



- F4170

by: Howie. K05/02/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I must say the product was sold a great price, and delivered quickly. It installed easily following the directions and performed as expected. It handled the extra load on the 2012 Sante Fe and kept the ride smooth and level on our 1,200 mile rides. I do question the installation instruction as to the length of the stub tube under the elbow (at the top of the air bag). Installed it appeared the elbow was bent over at a very sharp angle and I fear a kink developing in the tube (though there is no problem to date and perhaps the little extra length prevents the kinking ?). They have been installed around 5 months now and have around 8,ooo miles on them. I have delt with e trailer before and will again....HIGHLY recommended 78713


Comments

The Santa Fe 2007-2009 has WAY to soft a rear suspension. In the UK they even have an OEM self leveling kit! But on in NA...So I bought the F4170 kit.Had it installed by a pro in June 2012.The mechanic last year did not trust the tubes or the connections. Felt like it was toys stuff. Not meant for 35lbs of pressure, not automotive grade.But it worked!What a different that made! It was great, my car behaved great even when fully loaded. It was an awesome solution, it proves the SF has a weak suspension, even though they say we it can loaded with 1100lb of gear. It was perfect, until the following spring. When I got to inflate them a year after installation, there was a leak. In both of them!! I lifted the car to check and one was totally torn open. There is a disc on top to protect the balloon, but it seems too small. Theres nothing to hold it centered, and thats probably what happened: it moved, got off center, and it could not protect the balloon from the jounce holder.For the other one, like mentioned above, the connections a weak. The mechanics calls them quick connect. Well you get the quality of a connection done quickly: not strong enough.Technically I am still under the 1 year warranty, well see. But if it was to do all over again, I probably would not choose that. Looks like I will have to repeat that every year... The thing dont last.

comment by: Nick - 05/29/2013


1579

Firestone prefers to handle warranty claims directly, so please give them a call. Remember that these bags do have a minimum air pressure. Firestone specs them at an operating range of 5-35PSI. If they drop below 5PSI there is risk that the bags will not hold their shape and pressure and be prone to damage because they are inside of a moving coil spring.

Patrick B - 5/29/2013



Comments

Made another trip to Florida since installed..LOADED..... and the airbags performed very well. Level vehicle and no real noticeable harshness in the ride. Im a happy guy.We load the car, put kayaks on the roof and put about 350 lbs in a receiver hitch style carrier and the car is level and rides nice. I have nothing negative to say. Oh, I run 45 PSI loaded like this and it works great.

Howie K - 05/02/2014

3925

- F4174

by: Bob B.11/17/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Thanks to all of the folks who shared their observations on the installation of Firestone Air Helper Springs on Toyota RAV4s. Some of their suggestions made my life much easier. The Firestone instructions, as others observed, were pretty generic and were probably not written by a person who actually installed them on a RAV4. Here are a few things that I found useful: I found that the easiest way to cram the air bags into the coil springs was to flatten them like a pancake with the top and bottom surfaces collapsed onto each other and lash them in this state with a zip tie. Compressed this way you can push them thru the gap in the coil spring in the correct orientation so that when you release the zip tie they expand into the coil spring correctly. It helps to push them thru an opening just below the center of the coil spring so that the air bag ends up slightly below center touching the bottom plastic protective disk. It is really difficult to move the air bags up or down once they expand into the coil spring. I attached the air hose after the bag was in place. You can use a heat gun to warm the air hose enough to bend it so that it exits the lower control arm, turns 90 degrees, and runs along the back of the control arm without hanging down. As others noted the exhaust system presents special problems on the right side. I ended up routing the air line toward the brake and up to the upper control arm to stay away from the exhaust pipe. It's not clear what the best strategy is for routing the air lines. They seem pretty tough, but will likely be rubbing on something given all of the movement in the suspension. I'd suggest not cutting the air line and starting with the right side, which for me needed more air line length to keep away from the exhaust system. That way you will have enough air line to finish the right side and you can use the remainder on the left side, which will need less. I cut the line in half to begin with and barely had enough for the right side. All of the bits seem to be of high quality. The quick connect air fittings seem to seal well and grab tenaciously so you will have a very hard time removing them once you install them. Like a Chinese puzzle on steroids. Our trailer has around 440lb tongue weight and these have brought us back to level with a few psi to spare. We'll see how it goes over the road. Thanks to everyone who contributed ideas and suggestions. 161229



- F4174

by: Bill1004/01/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Installation: 2007 Toyota Rav4. The installation instructions were perfectly fine. Installation is not a complicated process; it's just a struggle to get the air bag inside the coil and into its proper shape. Everything else is easy. Also, the instructions clearly stated how to remove the air hose from the air valve. Although not provided in the instructions, I removed the rear wheels for the air bag installation. While that took some weight off the coil's extension, the trade-off was easier access to the coil from the side rather than from underneath...and I did get the air bag inside the coils fine. In installing the air bags one bit of advice is consider using more fingers than tools. Once I put the blunt-ended tools down and worked it into place with my hands the install went much better. Once the air bag is inside the coil and the air plug is removed, the coil doesn't just pop into place/shape. It still needs to be worked in a spinning motion and using the soapy water from the sprayer that you'll need to check for leaks will come in very handy doing that. I tow a 1,000 pound covered trailer and have recently purchased a motorcycle hitch carrier to haul my dual-sport motorcycle. I always wanted this air bag set up for my towing, but it was the carrier that got me to pull the trigger on the Coil-Rite. Using the top of my rear wheel well as a point of measurement, the stock height was 32.75". Putting 525 pounds on the hitch receiver (motorcycle hitch carrier and motorcycle) the height dropped to 30.25" (-2.50" from stock). Pumping up the Air Bags brought the height up to 31.50" (+1.25" above the ladened height but still -1.25" below the unladened height). The specs on this product state that the Firestone Coil-Rite's load leveling capability ranges from "at least 500 pounds (at most 1,000 pound)." I was expecting the Coil-Right to level my vehicle with the 521 pound receiver tongue payload and it falls short 1.25" (or only half of the total ladened reduction in height). I'm giving the product a good rating as it was fairly inexpensive and something I could install myself...and does, in fact, help my leveling for towing. However, the spec says it should have leveled at 500 pounds and it didn't. 242614



- F4146

by: Matt M07/07/2012

Review from a similar Firestone Coil-Rite in Vehicle Suspension


My review is only on the installation of these, and only on a 02-07 Jeep Liberty. To me, the instructions were VERY vague. The hardest part was running the air line. Instructions said to run it through the box frame and through the 3/8" hole in the top spring holder. Seriously? I fed the line though the hole and who knows where it is going. The only access hole near the springs is on the outside of the frame, and must too small. Well, I opened the hole a bit, painted it, and was able to get my finger in there to fish our the line. If I had a wire fish, I may have been able to fish it out without opening the hole. The other thing, drilling the 3/8" hole wasn't easy. The boomerang limited the amount that the axle would drop. Luckily, I found a short enough 3/8" drill in my assortment that was just long enough for the job. And still, it was a pain. I was wishing I had a right angle drill at that point. One last thing, it didn't state wear to put the heat shield. I figured where the exhaust is closest to the spring. Of course you have a curve there, but a little bending, I got it done. I am debating on putting some header tape in that area. 47084


Comments

Have u towed anything with these and have they helped. I have a 04 liberty and was looking for something to help with towing.

comment by: Billy - 07/15/2014


5649

- F4155

by: John L.12/09/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I put these on two Toyota Siennas ('06 and '09). Installation was "easy" without any special tools to speak of. I didn't have to remove the bottom bolt of the shock. If you collapse the rubber and use the red plugs to hold them without air, they will fit between the spring coils with a little coaxing. So far very happy with both. Have had the vehicles loaded heavily multiple times and the difference in load capacity and handling while full is impressive. Ride can be a little stiff if you leave the air pressure at 35lbs without a load. I find around 25lbs is perfect for average use. Anyone with a Sienna knows that loaded down and the trailer hitch will drag in and out of parking lots etc. No longer with these on! Drilled through the bottom of the plastic bumper on one for the valves. The other one I attached an angle bracket to the plate where you would mount a larger trailer power plug. Would absolutely recommend these to anyone with a Sienna. JL in SC. 109652



- F4170

by: J.B.Slye09/08/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The F4170 kit does fit a 2009 Hyundai Santa Fe. However installation is not quite as simple as the video. In order to remove the jounce bumper and install the air bags on our All Wheel Drive the springs needed to be removed. The instructions show a 2" piece of air line at the bag and then a 90 degree union. Make that 1.5" and the union will not hit the top of the steel jounce bumper cup. Insted of a 7/16 inch hole for the lines, go bigger and put in a grommet so the line does not rub. I went to 5/8 inch and then used 3/8 fuel line to cover the air tubing. Protects it from getting cut and from heat at the muffler. I agree that the top spacers need work. No real retention or centering on top of the bag. I put RTV silicone on the spacer and then placed it on the air bag. It centered on the bag and it should stay put. When the vehicle is off the ground and the springs are at full extension, and the jounce bumper cup does not touch the spacer. With the bigger hole, the fuel line guard, and the RTV I hope the work for a while. If not the bags are lifetime warranty and the hardware has 2 years. 98925



- F4170

by: Darrel K.08/25/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Okay, first of all. I have had this type of air spring helper bag before on several vehicles so I'm fairly familiar with how they are setup and work. Ordered this kit, good pricing, fairly fast ship..... And then the fun began. I did watch a video on the install. Looked pretty straight forward but with these latest polyurethane bags it looked like it would be a challenge to just "push" these through the springs AND get your hands in there to connect them. Oh, well I gave it a shot and sure enough one of the brass L shaped fittings for the bag just snapped off in my hand! Etrailer did address this and sent me new lines. And I'll be honest here.... threw everything back in the box and let it set for another month. Okay, let's do it again, MY WAY, this time. I dropped the rear coils completely this time, easily fed in the bags with the lines PREATTACHED, put the coils back in place and finished up the rest of the install. It's up to you....but I think just dropping the coils completely takes less time and you'll end up with a neater install. Oh, and here's the best part....these things are awesome on these long wheelbase Hyundai Santa Fe's. These SUVs don't have enough springing in the back to begin with. If you pull a trailer or hall a lot of tools, etc., in the back, trust me, you will see "extra" tire wear because that rear suspension will be sitting on the snubbers a great deal of the time. By going from around 10 to 30 psi I have a great deal of control over both ride height and improved stability in tow and heavy haul situations. I would recommend them, just take your time on the install..... 287475



- F4179

by: Joe B.07/10/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Works great on my 2010 Honda Odyssey. Easy to install if you remove the main bolt of the suspension lower arm (that holds the spring). This is a much better approach than to squeeze the bag between the springs. On an Odyssey, you must first remove the yellow rubber stop bumpers at the top of the springs. I've attached pictures to show the installed part, the air hose attachments, and a side shot to show the lift I can now achieve with only 24 pounds of air pressure in the bags. Also, the customer service was outstanding. When I ordered these, Firestone was out of the part. As we waited just under 2 weeks for more to be manufactured, Lexus (not a car; the name of my customer service representative) kept in regular contact with me and was exceptionally courteous and helpful. If you have a minivan that rides low when loaded or towing, I highly recommend these and I am extremely pleased with etrailer. 210948


Comments

Its a year later and I still love the product!

Joe B - 08/05/2016

19983



- F4176

by: JimT11/05/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I purchased this product on the recommendation of a service writer from my local VW dealership. I carry a lot of tools and equipment in me Jetta Sportwagen for work. Shipping was super quick and follow up was excellent. I just installed the air bags yesterday with a friend. Very easy to install. One helpful suggestion, after the first attempt to stuff the deflated air bags in the spring we found it too flat and hard to get in. I suggested squeezing the top end round like an eggroll and putting a cable tie around it to hold it and then getting the remaining air out. It goes it much easier and no need to remove the bottom shock mount. Huge difference on the ride home! Ride height back to level with 350 lbs of equipment in the back. I highly recommend this product. 231481


Comments

A full year later and not a single problem. I havent had to add air since I set the bags up. About 11k miles of mostly city driving.

JimT - 11/04/2016

21757



- F4150

by: Tommy D02/18/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Bags came quick and as described. I'm a professional technician so install was pretty easy. It is a little tough getting the bags in the springs but with some patience they go in. Can't wait to hook up my travel trailer and see how well they work. 2010 Nissan Armada SE 116843


Comments

Hi Tommy,What was the difference in ride handling when you hooked up you TT? Do you think an amateur could install these without special tools? Thanks,Alvin

comment by: Alvin N - 07/01/2014


5235
Comments

Alvin, the ride was definitely better with the trailer hooked up after I installed the airbags. I run them at 10 psi normally and 25 with trailer hooked up. With no trailer the rear feels more planted to the road and towing it feels more stable. I still use leveling bars to help with the weight but I definitely recommend these if your going to tow. As for install its not difficult but just a pain to get them squeezed down and pushed through the springs. After that the hoses are simple push ins and just be sure to route them so they can move and away from the exhaust. Tom D.

comment by: Tom D - 07/01/2014


5243

- F4169

by: Mark R.07/12/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I installed this product on a 2007 AWD Ford Fusion. It was easier to install by completely removing the coil springs during installation. Also, for the AWD model, I had to remove the rubber bump stops and then grind down the rubber supporter for the top of the new blue air bag. There was no need to use the 90 degree elbows and drill a hole in the jounce mount due to a straight vertical hole which was perfect for the air line so there is one less potential leak point. Car rides perfectly and has the stance now that Ford should have done from the factory. 89273


Comments

Product has worked out well now. It leaked the first week in which my wife and daughters were going to Florida and I had no time to change it out. After sending several photos to customer service, I received a new bag I did not request a whole kit and installed it and have not had one single problem in one year. Thanks for a great product.

Mark R - 07/14/2014

5599

- F4176

by: Daniel B10/29/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Etrailer was fanatic there communication is great and follow thru Install was a bit harder then other reviews say it is as far as getting the air bags inside the coil springs .I ended up taking the coil springs off the car for install not hard just time .after air bag install the rest was a peace of cake .With 35 psi in the air bags car was a lot firmer rode better and handle better then stock .Still the vw sport wagon is weak for towing tong weight .But the air bags are a must have if you tow anything or even carrie a bike rack 105672


Comments

Still working Great i just check the air pressure every now and then and i keep towing a three rail dirt bike trailer with three bikes on it very happy with air bags

Daniel B - 10/30/2014

7499

- F4118

by: Larry M.07/04/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Installation on 2014 Pathfinder didn't require Shock removal. It went in fairly easily. They are helpful although wonder if they shouldn't be slightly taller . With 5 passengers and trailer approx. 3500 lbs. still sags some. In my opinion Japanese cars all have Weak rear suspensions 139152


Comments

How did you install with the stop built into the top spring seat? Also did you run the air hose out the bottom? Thanks

comment by: Will - 08/13/2014


6226
Comments

To Will , To be honest, I didnt even look at the upper inside of the spring for a stop . I simply collapse the bags and worked them into the spring . Yes I have the air fitting and hose coming out of the bottom . I used extra cable ties to secure the hoses. I drilled NO holes in anything. I was carefully of routing the lines away from the heat of the exhaust. I mounted the Air fittings to the holes in the receiver. One complaint is that I have great difficulty in filling the them. I dont know if it is the Tire chuck I am using or the Fittings provided. I actually end up unscrewing the nut on the fitting and take the fitting and hose free from the receiver to press the tire chuck on far enough to fill them then remount the fittings to the receiver

comment by: Larry M - 09/30/2014


7059

Thanks for responding Larry. In the installation instructions Firestone recommends removing the factory jounce stop, or spring seat before installing the Air helper springs.

Rachael H - 10/1/2014




- F4118

by: Daniel Herkes09/16/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The product came very soon after I ordered it and is just as what is pictured. While there are no instructions in the kit - I am a capable mechanic and do not need any. It was tough getting the bags into the springs of a 2013 Pathfinder. I relaxed the suspension as best I could, but the spaces in the coils are not large. It helped to insert the bags from the middle of each spring. The air lines are a combination of schrader valves both conventional and friction fit - take care to trim the friction fit square. I used a sharp knife. I had to fabricate a mount for the exterior valves and used a piece of 1/8 sheet aluminum. I noted the difficulty of routing the air lines away from the hot exhaust and over extension and flexion. On my vehicle the air line must extend from the bottom of the spring and this will, unfortunately increase the risk that the line will foul on a road hazard. Spend a few moments under your vehicle and route a path for the air lines before starting the install. Overall these bags seem to be a rugged option for a suspension boost. I will add to the review as time goes on if necessary. 295316



- F4166

by: Dale O.11/16/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Excellent product. Installed on a 2012 2x4 Nissan Pathfinder to stiffen rear end. We often load the vehicle with gear and a utility trailer and found it tends to squat a bit; the air bags solved that problem. Easy to install, but the instructions included with the units are incomplete as they omit inserting the support plates. However, the installation video on the etrailer website covers this and should be viewed. I was able to do the installation with the vehicle on the ground and without removing the wheels. I dropped the spare tire and jacked up one side at a time just to where the tire was almost off the ground, placed jack stands and worked from under the car. You really need to be able to put a lot of pressure on the deflated units to get them inside the coil springs. I found the best tool for doing this is a ball peen hammer; using the handle to push against the bags and the head for a good grip that allows pushing real hard without damage to your hand. 316982



- F4177

by: Tom V.09/12/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Once installed these did just what I hoped for raising the rear of the 2012 Ford Flex about 1 full inch under trailer load (at 30PSI in airbags). This is enough to make the car's headlights less annoying for oncoming traffic at night. I find that with about 10 PSI in the air bags and no trailer or luggage the vehicle has slightly more roll resistance which improves high speed stability, too. Very nice product. I attempted to install them but only frustrated myself. I took the car to a guy I trust and he did a great job with the installation. He ran the tubing to a central fill point as I also had ordered the "TEE" fitting. The fill fitting is right near the hitch receiver and very handy. It's nice to be able to fill both bags with just one fitting. 293864



- F4155

by: Bruce B.01/31/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension


This Firestone #F4155 air-bag product is excellent. The fit to my 2011 Toyota Sienna was just as described. I installed the bracket and the two air-fill valves in the jack compartment, easy to get to and out of the weather. etrailer has been a pleasure to deal with. 172005


Comments

Love the product. Had it installed by my favorite local Toyota dealer. Makes a nice difference towing our Park Liner Fiberglass Egg Camper. Would certainly recommend.

Bruce B - 02/01/2016

16645



- F4176

by: Brad S12/23/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Easy installation; I replaced my worn shocks as well at the same time on my 2010 jetta sportwagon. Removing the shocks gives you a few more inches of room to slide in the assist bags. It was easier to slide them in after wiping the bags and spraying the coil springs with silicon. I routed the air lines through the frame and mounted the valves in the spare tire well. Much better ride especially when towing my 5x8 trailer. 110981


Comments

Can i ask what you used as a bracket to mount in the spare tire well? Did you plug the holes you drilled with anything?

comment by: Shane K - 01/12/2015


8570


Comments

- response for Shane K question - I did not use a bracket to mount the filler valves in spare tire well just used a drill bit slightly larger than valves and the tensioner nuts holds the filler valves in place no worries. Just be sure you mount the valves so that you can fill them when the spare is in place. I used silicon sealer around the edges so no air can get to the bare metal.

comment by: Brad S - 01/13/2015


8597



- F4157

by: Wil Chaney05/04/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Instructions are weak. They do not explain how to get the "jounce" bumpers out of the coil springs. Secondly, I cannot locate the air leak, but figure it must be on top of one of the air bags and that the jounce mount might be hitting the elbow for the air line. Not a very good design. 78945


Comments

My 2008 Grand Jeep Cherokee Overland has those yellow things jounce bumpers inside the coil also. Do those need to come out? Is it ok then that the bag doesnt fully occupy the space vertically?

comment by: Michael B - 11/27/2013


2365

The jounce bumpers do need to be removed to install the kit. Once the veichle is lowered off the jack stands and supporting its own weight, the slack will be taken up. If you do go for an air spring kit, I strongly recommend purchasing a tubing cutter to go with it. A lot of leak problems are cause by out of square cuts with a box cutter. Check out F9009 and AL10530.

Patrick B - 12/2/2013




- F4176

by: Erik S.10/11/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I just installed these Firestone Air Bags on my 2011 Jetta Sportwagen. I did it myself and it was easy! Just remove the tire... The bag slides in without even removing the shock. I'm towing a 13' Scamp trailer, and the lift is about 2" at 30 psi... The ride and steering are greatly improved! This product actually performs as advertised! 103418


Comments

I will pick up a scamp 13 type 2 this May in Backus, MN using the same as your TV. I would appreciate if you can give me some type of feedback regarding your jetta performance, towing wise and MPG. I will be coming from Southern CA.I opted for an electric brakes on my and installed a curt hitch. I am in the process of installing a curt brake controller and wiring ,all purchase from e- trailer. You help me decide to install the Firestone Air Bags to my TV and I will Install it myself too. thanks to you.

comment by: mariano L - 03/17/2014


3158

- F4174

by: Chuck W.05/19/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension


So far this has been every thing it was advertised to be. Install took a couple hours give or take I didn't really time it. The install went well, no busted knuckles or any thing! I forgot to order the "T" fitting so I'll have to go back and take care of that. So when you order get the "T" to avoid my error. Etrailer has been great. Deliver was timely when I made the order the Coil-Rite set I needed was on back order but as estimated by etrailer it arrived within two weeks, so no big deal there. I installed the Coil-Rite on my 2014 Toyota RAV4 to help level the body out when towing our ATV trailer. I haven't had a trailer hooked up to it yet but looking forward to it. I'm pushing the max towing capacity of the RAV so I really want to keep the breaking as solid as I can. Keeping the body level will help there. 194450



- F4108

by: Rich from Cold NY09/11/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Having had them on for a year now...Excellent! I was skeptical because of the cheap price as I am used to the higher quality rubber/metal frame units but they have done the light duty job I bought them for. Installation was challenging in order to squeeze them through the coils but it is do-able. I mounted these inside of a 2000 Tahoe. I mounted the bags with the air line to the top and ziptied the lines along the wiring conduit. Valves were installed in the rear bumper next to the plate which is perfect because at night time they are illuminated by the plate lights. I run 20lbs at all times. One thing I would recommend is buying an airline T and using only one air line for fill/deflate. Two is a pain. I used to have one on my old set up and it was far easier. The T collects both lines behind the bumper. Enjoy. 224920



- F4108

by: Al S12/16/2012

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The directions are set up to cover a wide variety of vehicles. There are pages inserted for adjustments to the instructions for a smaller group of vehicles closely related to mine. I still found them confusing and not very clear. Once I got past trying to do exactly what the instructions (or at least the pictures) were saying, I was able to just look at my setup and install the air springs. The picture for the inserted heat shield instructions was the most confusing because it shows the air hose on the top but for my Avalanche (and I believe most late GM SUVs) the air hose is on the bottom. On the positive side the product appears to be of strong construction for the springs, hose, and the fittings. I'm confident it will greatly improve my Avalanche's ability to tow my trailer safely 61590



- F4150

by: Ryan04/05/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Installed on the rear coils of a 2008 Nissan Armada after removing factory air shocks and installed a 2" lift. Easy installation and works perfect for my needs. Only suggestion would be to add a "T" to the kit so you can inflate at one point versus two. 123901


Comments

Ryan, are these still working well and how much do you haulwith how much tongue weight. Thank you.

comment by: Brent S - 02/09/2016


16740



- F4176

by: Curtis B.08/05/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The product does work, but for how long is the question. Installation was straightforward. I was very careful to make sure i had clean straight ends when i cut my tubing. After installation i filled up the air bag to half the rated PSI. Soap tested and test drove for 20mins. Filled the bags to 3/4 there rated and soap tested, test drove another 20 mins no leaks. My first trip with a trailer on the ball was 90 long and by the time i arrived one bag had leaked out where the hose pushes in. Do to space i had to cut the line to remove the bag remove the hose and then reinstall. The system does work. I'm just not a fan of quick connects. Due to the amount of work to install the bag i would like to see a more fail safe hose connection. 279882



- F4179

by: Brian06/02/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Installation of the first side was pretty slow and frustrating. The second side went much better. Dealing with the coil springs is always difficult, and I had a hard time getting the coil spring seated properly. Also, determining where to to drill the hole for the airline is difficult. I ended up using a Dremel to get it in the correct spot. Anyways, the air springs seemed to do their job, and adding 20 psi of air raised the back about 1/2". My wife complained about some squeaking coming from the back. Probably from the coil spring not being seated properly. A week after the install, the Pilot was rear-ended and totaled so I can't give any long term advice. 82892



- F4174

by: JRS04/10/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


My airbags were put in a Toyota RAV4. Installation was not easy. To get the airbags in the spring the spring had to be removed completely. No way to put it in through the spring leaves. To remove the spring it is better to remove the center suspension arm bolt and leave it attached to the wheel attachment portion. Much easier to get the arm back in place this way. When placing the airbag in the spring it is easiest to collapse the airbag lengthwise and hold it collapsed with a tie wrap. Then put in the spring and once in place cut the tie wrap.Once installed the airbags seem to work as advertised. Good luck, these suspension bolts were tight. 124532



- F4108

by: Mike G08/28/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Leveled out my Yukon. Good for long hauls. Keep pressure. I check them before every haul and have not had to add air. I deflated them down to 10 psi over the winter since I only use my truck to tow a camper. The ride was similar to the original but with less body roll. They are well worth the money and take little effort to install. I would recommend coupling these with a higher load rated tire as well. I put on some Kumho AT's that were a bit grippy and load range E. It rides like a 3/4 truck when I have everything inflated and like my wife's luxury SUV again when I let some of the air out. Great combination. 288676



- F4155

by: Don R.10/05/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I did not actually time the install but I believe it was less than an hour. I have been loading my 2008 Sienna very heavy when going on vacation. This last time my trailer hitch that I use to haul 5 bikes dragged leaving the driveway and was just a few inches off of the pavement when sitting on the level. I installed this system and tested the load with live body weight, I had a family visiting, they crawled into the van and it did not sag half as much as before. My next big trip is coming up in a week, so we will be giving it the full road test then. I recommend this product. 303574



- F4170

by: Tony B.08/27/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I was going to use my 2011 Hyundai Santa Fe to tow my pop-up camper for the first time and during the test drive decided that the suspension was a little bouncy, so I ordered the Coil-Rites. Very happy with them. They installed quickly (I watched the installation video on e-trailer.com a couple of times) and in less than an hour I was ready to go with a much improved ride. I highly recommend the Coil-Rite's and etrailer.com. This was my second purchase and each time I was extremely satisfied with the experience. I will buy from them again. 148984



- F4179

by: Mark04/26/2011

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I installed these on my 2006 Honda Odyssey to pull an 18ft (total length) popup camper. My van used to bounce pretty good through intersections and would occassionally bottom out on the big bumps. After putting these in, it rides nice and level, and hardly bounces at all, improving the ride for passengers and popup alike. One note, I had them installed at a local shop and he ran the airline so each stem comes out just in front of the rear wheels (through the bottom body panel) to avoid the exhause. 12359



- F4175

by: Mike C11/07/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I installed the F4175 kit on my 2013 VW Beetle TDI. Installation was very easy. I usually carry a wheel chair which lowers the rear 1 inch. My base unlaiden measurement was 9 inches. I put in 5 lbs of air and rear end went up 1 inch I then put in my wheel chair and the rear end went back down 1 inch, which put me right back to my base unlaiden measurement, so the vehicle did not sag at all and remained level. I need to do a full ride quality test, but it seems a little firmer in the rear. 106659



- F4108

by: Tim P.01/20/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The air bagsy fit nicely into the coil springs so there are really no modifications needed to install them. The exhaust shields are easily shaped to fit onto the tail pipe where it wraps over the axle. The only hic- up I had was the installation instructions did not include a diagram of the hose routing for my vehicle, which tells you to mount the bags with air line out the top or out the bottom. I found there was more room out the top and a shorter route for the air lines to be ran. 63562


Comments

Tim, Firestone does not include instructions on howwhere to run the lines as so many people want or need to locate them differently, even on the same vehicle.Some like the fittings mounted through the bumper for easy access, others like them hidden underneath, and others still need to run them forward to a remotely controlled air compressor under the vehicle.

Patrick B - 01/21/2013

881

- F4168

by: Ray J.03/18/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Great product, received it Friday, installed it on Saturday. 2012 Cadillac CTS 2 Dr. In my driveway, removed the bottom shock bolt so the coil spring would relax (expand). Left the Air Spring sit in the SC sun for about an hr. to soften up and they installed easily in between the coils. Liked these better than a different brand I installed in my 2005 GTO. etrailer called Firestone to make sure they would fit the 2 dr. coupe since the suspension is different than the 4 dr. CTS. 121220



- F4168

by: Brian02/23/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The instructions need to be modified. It is nearly impossible to roll this up and stuff them through the coils if they are still on the car. I had to take the coils off, and then it's very easy. Instructions don't say how far down to place them, so I put them somewhere in the middle of the coil. The valve protector plate just sits loosely at the bottom. Otherwise, an easy install and, although I haven't tried them with the car loaded, they really stiffen the back end of the car. 117278



- F4179

by: R. Witters07/06/2012

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I purchased the Firestone Air Helper Springs for a 2006 Acura MDX. I wanted some extra lift in order to pull a large pop-up camper (300 lb. tongue weight). I had the springs installed by a local mechanic (install time was approx. 2 hours). Product works great and gives the extra lift that I needed while trailering. I would recommend filling the air springs with a hand pump. With the small volume it is tricky to get just the right amount of air in the system. 46957



- F4155

by: E07/07/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


I installed Firestone Coil-Rite Air Helper Springs and they work great. With minimum air pressure they improved the unloaded ride and driveability. Loaded the van for vacation, added air pressure to bring the ride height back to the normal ride level and the van drove and handled better than when it was new. Followed your on-line installation video and installation was a breeze. The installation instructions with the kit were poor and incomplete. . 139788



- F4174

by: Don R.08/19/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension


An excellent product. While I wouldn't say the installation was easy, it is doable. As hard as it was, the results were amazing. I tow a 19' boat with a Rav4. Before the air bags the rear would squat about 2" with the boat hooked up. Now, with the air bags installed, the rear actually sits about 1" higher (3" overall) than without the boat when I inflate them to 30 lbs. I installed a tee in the air fill line so that I have a single fill point. 147353



- F4174

by: MTC10/10/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension


As a former mechanic, this was a tough install. It was a struggle to get the air bags through the springs and there was not enough room to remove the 3" piece of tubing so I installed the bag with the full length of tubing already in place. I was hoping to gain about a 2" lift, but it only raises the vehicle about 3/4 of an inch. The bags do make a noticeable difference in handling and the hitch is not so close to the ground while hauling a trailer. 103341



- F4181

by: Rick C.11/16/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Installation was pretty easy on a lift. The kit went in as designed except I changed to using a tee connector that I purchased from xxxx to connect both air lines together with 1 air valve. I haven't had any issues and they hold the air without any leakage. They work excellent for carrying more weight without sagging the rear of the vehicle, it still drives perfect with or without weight in it. I've been running with approximately 8 lbs. 316980



- F4184

by: Jhop04/21/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Not hard to install. Noticed a better ride right away. I have not towed the travel trailer yet though. I ended up not running the air lines because I did not want anything to show so I just put the valves on the bottom of the bags. 187044



- F4174

by: David P.08/07/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


The kit was shipped very quickly. The video help quite a bit with the installation. The air bags are a bit tricky to place inside the coil springs. We wound up pushing them up through the hole in bottom of the swing arm. Same hole that the black rubber bumper is inserted through. Took a bit of finagling, but we got them eventually. We just used a single edge razor blake to cut the air lines. Worked fine. No leaks. 281026



- F4176

by: Tim F03/09/2016

Review from a similar Firestone Coil-Rite in Vehicle Suspension


Used the Air Helper Springs on a VW Jetta to help when we put the 4 bike rack on it. Worked perfectly, kept us level when loaded and letting the air out gave us the ride when empty. Bike pump easily pumped them up when needed. I would recommend this product for anyone needing to control ride height under load or when towing to stiffen the suspension. We have had them installed for over a year. Way to go eTrailer! 240426



- F4118

by: James P.07/22/2011

Review from a similar Firestone Coil-Rite in Vehicle Suspension


These air bags definitely help with keeping the rear end higher than it would be (towing with a minivan, 300lb tongue weight), but as they are limited to 35psi, don't lift the rear as much as I would like. They are perfect for a full van by itself. Fairly easy install, only hard part is getting bags into coil spring. Air hose connections work very nicely. Used for 2 months and one 1000 mile towing trip so far. 20008



- F4155

by: Mark M07/06/2011

Review from a similar Firestone Coil-Rite in Vehicle Suspension


This was my second order with Etrailer. AWESOME. Product went out same day it was received. Great service and pricing, with service being the most important to me. The air bag support system for my Toyota Sienna van's rear spring coils was easy to install with very minor modications. They made a huge difference on the back end of the van "hitting" the ground when loaded. Just what I needed to pull a trailer. 18542

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Ask the Experts about this Firestone Vehicle Suspension
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  • Comparing the Reese Light Duty Weight Distribution System to the Pro Series RB2 for a 2700lb trailer
  • When choosing a weight distribution system, the most important factor to consider is the fully loaded and ready to tow tongue weight of your trailer plus the weight of any cargo behind the rear axle of your 2004 Honda Odyssey. Tongue weight of a trailer is typically calculated to be 10 to 15 percent of the gross trailer weight. If your Scamp trailer weighs 2,700 lbs, then the tongue weight may be around 270 lbs to 405 lbs. You must then add the weight of the cargo that you load in the back...
    view full answer...

  • Suspension Enhancement Options for Towing With 2004 Acura MDX
  • The Firestone # F4138 and # W237604138 are the same part. 4138 is the part number, and W237604138 is the SKU number that Firestone uses internally. Both the # F4138 and the Timbren # THROD2 are compatible with MDX models that have the coil spring rear suspensions only. It will not work on models equipped with the Coil-Over-Strut suspension. The Timbren springs will suspend up to 2000 lbs loaded in your MDX, while the Firestone Air Suspension is good for up to 1000 lbs. Neither system...
    view full answer...

  • What can I do to Level My 2008 Kia Sedona when Towing a Trailer
  • What year is your Kia Sedona?
    view full answer...

  • Installation of Firestone Coil-Rite Air Helper Springs Part # F4138 on 2007 Hyundai Entourage
  • According to our friends at Firestone, drilling the hole in the control arm will not weaken or otherwise damage the vehicle. The hole is absolutely necessary to provide access for the air line to connect to the bottom of the Coil Rite air spring.
    view full answer...

  • Installing Firestone Coil Rite Air Helper Springs # F4138 on 2010 Kia Sedona
  • The Firestone Coil-Rite Air Helper Springs, part # F4138 will install so that they sit inside the coil springs of your suspension on your Sedona. To install the springs, the lower control arm will be unbolted from the knuckle, allowing it to drop free and the coil spring to be removed so that the air spring can be inserted. You can see the full installation instructions by clicking on the link I provided. When installing the springs, cutting the air line perfectly square is crucial...
    view full answer...

  • Suspension Enhancement for 2016 Kia Sedona
  • eTrailer.com does not manufacture air bags, but we do offer suspension enhancement air springs for your 2016 Kia Sedona. Firestone's Coil-Rite Airs Helper Springs, # F4138, are the only enhancement we currently offer that is a fit for your vehicle, but they are a custom fit. This system utilizes compressed air to partner with your vehicle's rear suspension. The air springs fit inside the metal coil springs already on your 2016 Kia Sedona to help with a number of issues, like sagging,...
    view full answer...

  • Installing Firestone Coil-Rite Air helper Springs On 2000 Honda Odyssey
  • Per the installation instructions for the Firestone Coil-Rite Air Helper Springs, part # F4138, the overload bumper inside the coil spring will need to be unbolted and removed. You will also need to drill a hole in the lower control arm when installing this system. I have attached the installation instructions for this system you can check out. Installing a system like the Firestone Air Springs will not increase the vehicle weight carrying capacity.
    view full answer...

  • How to Check for Air Leaks on a Firestone Coil-Rite System with Inaccessible Inflation Valve
  • That is an excellent point. Firestone was recently here for training and they did address the issues installers have had with the instructions. Basically they are going to be redesigning all the instructions. But for you, you can check for leaks at every other place that you can (without disassembling the vehicle). Assuming everywhere else checks out then if there is a leak the only remaining place it could be would be the one place you can't get to unless you pull that control arm back down.
    view full answer...

  • How to Get the Rear Spring off the Spring Perch on a 2010 Kia Sedona
  • A long screw driver or pry bar should do that trick. I had a similar situation with my car and was able to pry the last bit of the spring off the perch by using a pry bar in one hand and a long slot screwdriver in the other. I pried up with the pry bar and then to the side with the screwdriver to help slide it off the perch. Be careful and take your time. To get it back on you will just need to reverse the process. Leverage is your friend, use the pry bar to compress the spring and the...
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Information for this part was:

Updated by:
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Photos by:
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Photos by:
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Expert Research:
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Written by:
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Video Edited:
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Test Fit:
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Expert Research:
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Video by:
Alan C
Updated by:
Sarah W

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Info for this part was:


Updated by:
Leah B

Photos by:
Theodore B

Photos by:
Jackie C

Expert Research:
Michael L

Written by:
Tyler C

Video Edited:
Joshua S

Test Fit:
Nicholas E

Expert Research:
Jeffrey L

Video by:
Alan C

Updated by:
Sarah W

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