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 F4136 can be ordered online at or call 800-298-8924 for expert service.
Select Your Vehicle

View Cart

Vehicle Suspension > Suspension Enhancement Kit > Rear Axle Suspension > Air Springs > Polyurethane Springs > 1000 lbs > Firestone

Firestone Coil-Rite Air Helper Springs - Rear Axle

Firestone Vehicle Suspension

(78 reviews)

Code:   F4136



Custom Fit Product

Shipping Special

Shipping Weight: 2.45 pounds


Firestone Vehicle Suspension - F4136

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.


  • 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


  • 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.

4136 Firestone Coil Rite Air Bags - Rear Axle

This Product Fits The Following Vehicles

2007 - 2013 Hyundai Accent

2002 - 2003 Isuzu Axiom

1998 - 2002 Honda Passport

2010 - 2015 Toyota Prius

1998 - 2004 Isuzu Rodeo

2001 - 2003 Isuzu Rodeo Sport

2004 - 2006 Scion xA

2008 - 2015 Scion xB

2007 - 2015 Toyota Yaris

Customers Who Purchased This Vehicle Suspension Also Bought...

Customer Reviews

Firestone Coil-Rite Air Helper Springs - Rear Axle - F4136

Average Customer Rating:  4.5 out of 5 stars   (78 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.

- F4136

by: Walter02/28/2014

installation instructions could be better When you deflate to work into spring, once you get one end in you should release the deflater stopper, makes it easier to work into place. Also, if you work it in from the top, once you get it mostly in, rotate it around like you are screwing it in place, this is my 3rd set to install, struggled on the 1st set, easy to do now. Just a few suggestions 117978

- F4136

by: Vince B.10/06/2011

Installation was not that hard and it makes a big diffenence in the ride of my vehicle. I have a 10 year old car and the springs were not performing well even though I changed the shocks. These bags are the greatest, especially for the cost. 25181

- F4136

by: JM07/07/2014

Installation of the first air bag took me about 25 minutes, and the second one about 5 minutes. I heated the second air bag with a heat lamp to make it more flexible. I think my 2010 Prius drives better with them installed. 139888

- 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


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


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


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


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


- F4138

by: David Bordne08/12/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension

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

- 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


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


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


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


- 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

- 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


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


- 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

- 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


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


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


- 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


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


- 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


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


- 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


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


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


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

- 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


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



- 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


- 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

- 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


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


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


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


- 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

- 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

- 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

- 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

- 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 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 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


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


- 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

- 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

- 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

- F4135

by: Jim D.08/10/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension

I purchased this product to prevent rear suspension sag in my '99 4Runner while loaded with camping gear and towing a small boat. It's surprisingly easy to install, and it works very well! I'm very pleased with the purchase. And, as always, the customer service at etrailer was second to none! Shipping was fast, pricing was competitive, and the product was exactly as advertised. Thanks to the folks at etrailer! 218209

- F4134

by: August04/07/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension

Very fast delivery! Great Prices! These were a snap to install (less than an hour) and worked perfectly to level truck/trailer. Already ordered from them again and will continue too anytime I need something. Thanks ETRAILER! 74630


Well.... right bag blew after one week. will contact etrailer on warrenty.... Might switch to rubber snubbers and leveling hitch instead. May have just got a bad one........

comment by: Auguat - 04/17/2013


Thanks for the follow up. I see that you went with the Timbren kit instead, please let us know how you like it.

Patrick B - 4/25/2013

- F4166

by: George P.06/12/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension

I installed this air bag kit in my garage with a floor jack, razor knife, drill bit, and about 20 minutes of my time. Most simple install I have ever done. I did not even remove the tires. I love buying from E-TRAILER , they have great prices, great selections and fast delivery. I have bought many products for many different vehicle and always get the correct items. Keep up the great job guys! 84255

- F4155

by: Marc05/29/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension

Installed on 06 Sienna. Bought these for towing our 16' boat. Had a mechanic buddy put the bags in and ran air lines myself. Had one initial leak but I recut the end of the air line and it works fine. Noticeable difference when inflated to 25 psi. Some slow pressure loss over 24 hrs but well within driving times needed. Overall excellent service from etrailers and a very good product so far. 133395

- F4106

by: Robert R05/07/2012

Review from a similar Firestone Coil-Rite in Vehicle Suspension

this product installs with allmost no tools very tight squeeze to get it between the springs but with some presistance can be done ... it works as advertised and was a great investment.. how ever this come with two seperate air valves i recamend buying the T (witch the kit should come with) and just useing one valve for even inflaition unless you require more lift on one side or the other .. 39632

- F4170

by: James N.05/25/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension

Airbag installation wasn't very simple. Recommend taking the springs off the vehicle. this will help make the airbag installation much simpler. May take additional time, but trust me, I tried every other option. The bump stops are pretty easy to remove. Must cut them in half to get them out easily. Utilize the t connector for the air bags to ensure the same PSI is in both. 196554

- F4138

by: Jeff I.07/22/2013

Review from a similar Firestone Coil-Rite in Vehicle Suspension

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

- F4176

by: Craig B.01/12/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension

It was tougher than the instruction stated. At 70 yrs. old I don't have the strength to get them through the coil. Problem solved, dropped the lower "A" arm and removed the coil spring, in it went. The second one only took about 15 min. With the lift and scooter on the car no longer scrapes backing out of the driveway. (8lbs.) inflation. 168679

- F4181

by: Doug L11/05/2012

Review from a similar Firestone Coil-Rite in Vehicle Suspension

Hitch went on very easily. The only thing I would add is the exhaust system has to be let down almost all the way to the engine to clear enough to drill the holes. Also, I found it easier to fish a wire up through the last two remaining holes and the attach my fish wire to the supplied one to fish back through. 58848

- F4150

by: Larry01/12/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension

Quick ship, great help from etrailer staff in selecting product. Install was very easy (about an hour). If installing in cold weather it helps to keep the bags inside until just prior to install to make them easier to compress when inserting into the springs. Ride is much improved with these. 168697

- F4182

by: EAR08/13/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension

Product does what it says it will do for my 2008 Mitsubishi Outlander. Had a leak in one of the bags but Jean at got me connected directly with Fire Stone. They got a replacement out to me ASAP. Very happy customer TY The picture shows the extra weight I have on my SUV. 219000

- F4158

by: Greg G07/02/2015

Review from a similar Firestone Coil-Rite in Vehicle Suspension

I received it last night and only had time to open the box, inspect the parts. They look good. I wish they had included a 90 degree elbow for the hose. The air inlet is going to stick straight down and I have to turn it 90 degrees to make a neat snag free path to the center of the car. 208927

- F4176

by: Lee Seabeck08/27/2014

Review from a similar Firestone Coil-Rite in Vehicle Suspension

It took my auto mechanic 25 minutes to install the F4176 package in my 2010 Volkswagen Sportswagen TDI. All went smoothly and at about 10 PSI leveled the vehicle as wanted.The air bags were at a safe distance from the exhaust pipes. The mechanic is a AUDI/Volkswagen professional. 148991

Show More Reviews

Ask the Experts about this Firestone Vehicle Suspension
Do you have a question about this Vehicle Suspension?

  • Firestone Coil-Rite Air Helper Springs # F4136 for 2011 Toyota Prius
  • According to my contacts at Firestone, the Coil-Rite Air Helper Spring kit you mentioned, part # F4136 will indeed fit the 2011 Toyota Prius. When installing the system, it is crucial that the cuts made in the air line be absolutely square to avoid air leakage. We recommend using a tubing cutter like part # F9009. Keep in mind that the Air Helper springs will not increase the capacity of your vehicle. For installation details, click the provided link.
    view full answer...

  • Rear Suspension Enhancement for a 2006 Toyota Prius
  • For the 2006 Toyota Prius we do have one option that will help with a sagging rear end. You can use the SumoSprings, # CSS-1145R. These guys will fit in the spaces between coils on the rear coil springs and take care of the rear end squat. Suspension enhancement is meant to be installed on a vehicle that has suspension that is in good working order. I recommend having the rear suspension checked out first just to be safe. I have linked a video showing a typical installation of SumoSprings...
    view full answer...

  • Is an On-board Air Compressor Needed to Use Firestone Coil-Rite Air Helper Springs
  • You do not have to have an on-board compressor or control unit to use the Firestone Coil-Rite Air Helper Springs # F4136. To add air you would need to use a compressor of some kind. If you happened to have a portable one that would work. Otherwise you could use the ones at gas stations. To remove air you would just have to depress the valve, just like letting air out of a tire. I have included a link to the installation details for you. Having the suspension enhancement at the rear...
    view full answer...

  • Does Firestone Coil-Rite Air Helper Spring Kit # F4136 Fit 2014 Toyota Yaris
  • The Firestone Coil-Rite Air Helper Spring Kit # F4136 that you referenced is indeed a correct fit for your 2014 Toyota Yaris as indicated on etrailer's fit guide. The Firestone website just has not been updated. I confirmed with my technical contact there that this kit is a correct fit. The installation instructions are linked for your reference. If you wish to avoid the need for manual inflation of the air bags you might consider the Firestone Level Command II, part # F2158, which...
    view full answer...

Do you have a question about this Vehicle Suspension?

Info for this part was:

Photos by:
Theodore B

Expert Research:
Michael L

Written by:
Tyler C

Expert Research:
Michael H

Updated by:
Sarah W

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Stay Connected

Subscribe to email newsletter


privacy - we don't send unsolicited email reviews

All images, layout and content copyright