Rear Air Bag Helper Springs for a 2015 Toyota 4Runner

Question

Question:

I need a set for the rear coils, the rubber twist in kind. The timberlin bumper stops didnt work due to being about 4 inches to short. need something to level out 2015 4runner while pulling loaded trailer...is air bag lift better?

asked by: Marc J

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Expert Reply:

The ideal solution to level a vehicle that is sagging when towing a trailer is weight distribution and not helper springs. I can recommend both but for weight distribution you need to go by the total tongue weight. This is the tongue weight of the trailer when loaded and ready to tow plus the weight of anything carried behind the rear axle of the tow vehicle.

Air bags such as # F4135 for your 2015 Toyota 4Runner are going to offer a better ride and more adjustability than Coil Sumo Springs ever could so between the 2 options I advise you go with the air bags. I have linked a video showing an example installation for you.

expert reply by: Michael H

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Answer 1

We have two rear-axle suspension kits for the 2013 Toyota Highlander and one works with the 2- and the other with the 4-wheel-drive models. However, these kits are not air-bag types, but rather a micro-cellular polyurethane foam helper spring that…

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Answer 2

I reached out to my tech contact at Firestone, and he said that as long as there is no pinching or crimping of the air line, you can install the Firestone Coil-Rite Air Helper Springs rightside up or upside down. They will function the same as long…

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Answer 3

If you are able to cut the jounce bumper of your 2016 Toyota 4Runner off while leaving the coil installed on the vehicle you certainly could fit the air bag between the coils to install the #F4135 since this is commonly how it's recommended bag…

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Answer 4

Out of all the air bags we offer I recommend the Firestone Coil-Rite Air Helper Springs #F4135 for your 2023 Toyota 4Runner. I like the Firestone airbags over the other air bags we carry because they're more durable and are constructed better…

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Answer 5

The Firestone Coil-Rite Air Helper Springs - Rear Axle #F4135 are currently the only air spring fit for your 2016 Toyota 4Runner. I've attached the installation video to assist. If you want to add the compressor so you can adjust the pressure for…

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Answer 6

For simplicity sake you would be better off using a T-union so that you only have to inflate one thing and wouldn't have to worry about equalizing the pressure. For a union all you need is the part #AL21838.

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Answer 7

I recommend installing the Timbren system #TTORSEQ over the Firestone #F4135. Since you said you occasionally tow or carry a maximum of 3,000-lbs, the Timbren system would be a nice option because you do not have to make any adjustments to the…

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Answer 8

Hey Bryan, Thanks for the photo and specific info you gave, and if you're sagging to the point that it's affecting oncoming drivers you definitely need suspension enhancement. That much sag is actually going to affect your 4Runner as well…

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Answer 9

The most common issue with air bags like the Firestone Coil-Rite Air Helper Springs part #F4135 is the connection of the air line to the other components. It is recommended to use a spray bottle with soap water to spray each fitting to see which is…

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Answer 10

Hey Lynn, we generally don't recommend running more than one set of suspension enhancement on a vehicle because the performance of the two kits together has never been tested and most likely if you need two you are overloading things. I would…

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Answer 11

We have two options for suspension enhancement for your 2020 Toyota 4Runner which have pros and cons. The air bag kits like the Firestone part #F4135 have the advantage of being very adjustable which allows you to have the suspension support when you…

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Answer 12

In order to remove the air line from the push connector on the coil air bags, you'll need to use a pair of needle nose pliers and grab the collar on the connector. If you push the collar toward the air bag and pull on the air line at the same…

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Rear Air Bag Helper Springs for a 2015 Toyota 4Runner

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