bing tracking image
  1. Vehicle Suspension
  2. Firestone
  3. Air Springs
  4. Towing/Load Leveling
  5. Light Duty
  6. Rear Axle Suspension Enhancement
Firestone Coil-Rite Air Helper Springs - Rear Axle
Firestone

Firestone Coil-Rite Air Helper Springs - Rear Axle

Part Number: F4174
In Stock
$126.45
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

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. Great Prices for the best vehicle suspension from Firestone. Firestone Coil-Rite Air Helper Springs - Rear Axle part number F4174 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (715)
  • Q & A (0)
  • Photos

Firestone Vehicle Suspension - F4174

  • Air Springs
  • Towing/Load Leveling
  • Firestone
  • Light Duty
  • Rear Axle Suspension Enhancement
  • Suspension Only

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


Note: The construction material of the fittings may vary.


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.



W237604174 Firestone Coil Rite Air Bags - Suspension Kit - Rear Axle

4174

Installation Details F4174 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.4

714 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.

by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:


25
714
Show More Reviews

See what our Experts say about this Firestone Vehicle Suspension

  • How To Tow a Trailer and Haul a Motorcycle with a 2012 Toyota RAV4
    It sounds like you are wanting to carry a motorcycle on the back of your 2012 Toyota RAV4 while also towing a trailer. If that is the case then this is a pretty tall order for your RAV4 but is possible so long as the tongue weight of the trailer, weight of the motorcycle, and weight of the motorcycle carrier do not exceed the tongue weight capacity of your vehicle which is 350 lbs if you have the towing package. In order to mount both the motorcycle carrier and ball mount, the only option...
    view full answer...
    Image 1 for
  • Will the Firestone Coil-Rite Air Helper Springs Kit # F4174 Fit on a 2006 Toyota Rav4 Sport
    I spoke with my contact at Firestone and the Firestone Coil-Rite Air Helper Springs Kit, # F4174, will fit in a coil spring that is at least 4 inches diameter, inside width, and 6 inches tall inside. He said that they do not have any notes about fit on a sport model of the 2006 Toyota Rav4, so he believes the # F4174 kit will work, but that you should measure the rear coil springs to be sure. If your measurements are slightly larger than 4 inches diameter and 6 inches height, then this...
    view full answer...
  • Can I Use Firestone Coil-Rite Air Helper Springs With Compression Coils on my 2013 Toyota RAV4?
    Hello Edward, The Firestone Coil-Rite Air Helper Springs - Rear Axle # F4174 is a fit for the 2013 Toyota RAV4. However, because you already have the compression coils, this could be in the way of the fitment. The # F4174 requires an inside diameter of 4" and height of 6" inside of your coil. The # F4174 would be great for enhancing the ride quality by absorbing road shock and reducing the chances of bottoming out. I have also included a review video check out.
    view full answer...
  • Will The Firestone Coil-Rite Air Helper Springs Improve Ride Quality Of A 2013 Toyota RAV4 AWD
    Hey Edward, The Firestone Coil-Rite Air Helper Springs # F4174 is a fit for a 2013 Toyota RAV4 and can help improve your ride quality while towing. These air springs essentially just expand and prevent the coils from compressing. When loaded down this can help prevent sag and will help with handling for smoother ride quality. When unloaded I would air the springs down otherwise without the the weight your suspension can start to feel stiff and in some cases can be bouncier. Are you hauling...
    view full answer...
  • Choosing Between Coil Sumo Springs and Firestone Coil-Rite Helper Springs on 2012 Toyota RAV4
    A suspension enhancement product like the SumoSprings # CSS-1125R or Firestone Coil-Rite # F4174 are primarily designed to suspend the weight of cargo carried in the vehicle itself. It's not always the best choice for counteracting the vehicle squat caused by the tongue weight of a trailer being applied to the vehicle. The SumoSpring or Coil-Rite can in some circumstances act like a fulcrum, causing the load on the front axle to lighten, which can lead to decreased braking performance and...
    view full answer...
  • Best Way To Reduce Rear Suspension Sag On a 2012 Toyota RAV4 When Trailer Towing
    Between the Firestone Air Bags # F4174 and SuperSprings SumoSprings # CSS-1125R for your 2012 Toyota RAV4 I would choose the Firestone Air Bags. The Air bags are adjustable and allow you to dial in the ride quality when you have your trailer attached. This will allow you to improve the ride when you are hauling while also having less effect on your ride quality when unloaded. Since you are only looking for decreasing your sag when you are towing the best thing you can do is use a weight...
    view full answer...
  • What is the PSI Range for Firestone Coil-Rite Air Helper Springs # F4174
    In the instructions that I have linked for you, under Figure B it states the recommended operating pressures for Firestone air springs # F4174 are from 5 psi to 35 psi. So 35 psi is the max you will want to put in the bag in this system. In step 9 it is recommended to inflate/deflate in 5 psi increments to find the ideal riding condition for you and the vehicle.
    view full answer...
  • Troubleshooting Squeaking Suspension After Firestone Air Bag Kit Install on 2016 Toyota Rav4
    Any time there's a squeaking noise after suspension components were removed and reinstalled the culprit is typically the fact that the suspension hardware wasn't torqued with a load on the suspension. So what I would recommend you do is loose the suspension with the weight of the vehicle on the suspension and then retorque the bolts with that load on it. What happens is that when you torque the suspension components down with the frame jacked up in the air you end up repositioning some...
    view full answer...
  • Air Line Mounting Bracket for Firestone Coil-Rite Air Helper Springs 2018 Toyota RAV4.
    We do have what you need but the Firestone Coil-Rite Air Helper Springs # F4174 does not include the bracket to install on the hitch. You would need Replacement Inflation Valve Bracket for Firestone Air Command Compressor Systems # FWR17607560. Also Firestone Union Tee for 1/4" Tubing # F3025-1.
    view full answer...
  • Union Tee Recommendation to Allow Firestone Air Bag Kit to Only Need One Inflation Valve
    Yes, all you need is the Union Tee part # F3025-1 which will allow you to only need to use one inflation valve to air up the Firestone kit part # F4174.
    view full answer...
    Image 1 for
  • Replacement Inflation Valve for Firestone Coil-Rite Air Helper Springs
    It's called an Inflation Valve. To replace one on the Firestone Coil-Rite Air Helper Springs item # F4174 you'll need item # F3032-1. Or item # F3467 for a 2-pack. It might not be the fitting. If the line wasn't cut perfectly straight it would cause the leak because it'll prevent the fitting on the valve from clamping down correctly. You can use a cutting tool like the Air Lift Air Hose Cutter item # AL10530 which is designed to make perfectly straight cuts.
    view full answer...
  • Do Air Bag Kits have to Have Equal Length Air Line Ran to Each Air Bag
    You will be totally fine. Air pressure will equalize through the entire length of the lines and air bags on your setup. Having one line longer than the other would not cause either of the bags to have different pressure.
    view full answer...
  • Can Weight Distribution Be Used to Stop Sag on 2015 Toyota RAV4 while Towing 1200 lb Trailer
    It is likely that your RAV4 and/or its hitch is not rated for weight distribution. So what I recommend is to add Firestone Coil-Rite air helper springs # F4174 to help keep the rear of the vehicle level. I have linked a video showing an example installation for you. If your 2015 Toyota RAV4 has a Class III trailer hitch with a 2 inch receiver opening AND the hitch and vehicle are rated for weight distribution then you can use a weight distribution system. Consult the vehicle owners manual...
    view full answer...
  • Do Firestone Coil-Rite Air Springs Fit 2018 Toyota RAV4 Adventure
    I checked with Firestone and can confirm the Firestone Coil-Rite Air Helper Springs # F4174 is a fit for your 2018 Toyota RAV4 Adventure; these springs are actually a fit for all models of RAV4. I have added a photo showing the springs on an '18 RAV4 as well as a link to an installation video on a 2018 RAV4 of the Firestone Coil-Rite Air Helper Springs # F4174. Also, I do highly recommend the Air Hose Cutter # AL10530 to ensure straight cuts during the installation, as well as a compressor,...
    view full answer...
    Image 1 for
  • SuperSprings SumoSpring Compatibility with 2012 Toyota RAV4
    The Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Rear Axle # CSS-1125R will fit coils with a measurement of 1.25 inches between coils according to my contact at SuperSprings. It most likely won't be different for the AWD model but they have only tested for the rear wheel drive at this time. If you measure your coils, you will be able to confirm if it is a fit or not. The only confirmed fit suspension enhancement we have for both the 2WD and 4WD RAV4 for the 2012...
    view full answer...
  • Will the Bolt Facing Down in the Coil of a 2009 Toyota RAV Puncture an Air Bag
    Actually the bolt you see in the top of the coils of the springs on your 2009 Toyota RAV4 are used to install the upper protector that comes with the Firestone Coil-Rite Air Helper Springs # F4174. I confirmed by checking the installation instructions.
    view full answer...
  • Do Air Lines of Firestone Air Bag Suspension Kits Need to be Cut to Exact Same Lengths
    This is a good question but you do not need to make sure the air lines ran to each bag are the same length. As long as you have the same pressure in both they would perform the exact same. If your plan was to always have the bags inflated to the same pressure you could use a union tee like the # F3025-1 which would allow you to inflate one valve and both bags would be inflated to exact same pressure.
    view full answer...
  • Will The Firestone Coil-Rite Air Helper Springs # F4174 Help With Towing a 30' Travel Trailer?
    Yes, the Firestone Coil-Rite Air Helper Springs # F4174 will help make towing a 30' RV safer by reducing the amount the rear suspension is going to sag. A better option is to use a weight distribution hitch like the Equal-i-zer # EQ37100ET. This hitch allows you to transfer weight from the rear suspension to the front creating a more level and stable ride. It also incorporates sway control into the hitch which helps keep the trailer tracking straight. This hitch is rated for use on trailers...
    view full answer...
  • Troubleshooting Firestone Coil Rite on 2006 RAV4 that Leaks
    I believe your best option would be to do what the customer who left us a comment about the RTV did. I would recommend you use the RTV sealant to attach the spacer plate to the bag. Another issue that causes these bags to leak is if the air lines aren't cut perfectly square. For a product used to make perfectly square cuts I would recommend the part # AL10530.
    view full answer...
  • Will the Firestone Coil-Rite Air Helper Springs Hold Up to Weather in Alaska
    The Firestone Coil-Rite # F4174 are rated for use in temperatures as low as -40F, so they will be able to handle some of the worst weather that Alaska has to offer. You would not need to deflate them in cold weather, but it's likely that these bags would lose some of their pressure naturally because of the cold and the laws of physics. The one precaution you can take to avoid air leakage is by making sure that you use a tubing cutter # AL10530 during installation, which will make sure that...
    view full answer...
  • Will the Firestone Coil-Rite Air Helper Springs # F4174 Fit a 2018 Toyota RAV4 Adventure
    Since the Firestone Coil-Rite Air Helper Springs # F4174 fit all 2WD and 4WD models of the 2018 Toyota RAV4 they will be compatible with your Adventure. You may also want to consider installing a compressor kit like the Air Command I # F2158 as well. This will allow you to fill the air springs wherever you are at and includes a gauge for you to monitor their pressure. Installation instructions for both products have been linked for you to review.
    view full answer...
  • Does Firestone Coil-Rite Air Helper Springs # F4174 Fit 2017 Toyota RAV4
    The Firestone air bag kit part # F4174 that you referenced does not have any fit exclusions for hybrid models so it would work well for a 2017 Toyota RAV4 like what you have. If you don't run a compressor like the # F49VV you'll have to inflate them with a compressor either in your garage or at a gas station basically. If the bags of this kit take on a load more than 1,000 lbs they will basically become ineffective with the potential of breaking. But to be in a situation like that with...
    view full answer...
  • Suspension Enhancement Recommendation for 2018 Toyota RAV4
    Yes, we have the Firestone Coil Rite kit part # F4174 which is a confirmed fit for your 2018 Toyota RAV4 and would be exactly what you are looking for. The bags of this kit fit into the rear coil suspension of your vehicle and will allow you to inflate them to an air pressure that gets rid of the sag that you have. I attached an install video for this kit on a similar 2010 Toyota RAV4. You may also want the Firestone Air Command Compressor kit part # F2158 which will allow you to easily...
    view full answer...
  • Will the Firestone Coil-Rite Air Helper Springs F4174 Fit a 2018 Toyota RAV4 Hybrid
    Yes, the Firestone Coil-Rite Air Helper Springs part # F4174 are a fit for your 2018 Toyota RAV4 Hybrid.
    view full answer...


< Previous
12



Do you have a question about this Vehicle Suspension?


Info for this part was:

Employee Leah B
Updated by:
Leah B
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Updated by:
Daron K
Employee Alex H
Updated by:
Alex H
Employee Matthew E
Updated by:
Matthew E
Employee Tyler C
Written by:
Tyler C
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Jonathan Y
Video by:
Jonathan Y
Employee Robert C
Test Fit:
Robert C

At etrailer.com 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.


<