Where To Route Air Line on 2021 Toyota Sienna with Firestone Coil-Rite Air Helper Springs

Question:

The rear springs have a large bounce-stop at the top and the bottom of the suspension arm that holds the coil spring is solid. How does F4155 install on this vehicle without drilling/cutting? It seems like youd need to cut off the bounce stop AND drill a hole in the center plug on the coil spring mount to route the air line.

asked by: Eric D

Expert Reply:

I checked with Firestone and confirmed the Firestone Coil-Rite Air Helper Springs part # F4155 for a 2021 Toyota Sienna (FWD). It looks like we have installed a few of these kits on some older models, in these the air line went through the top of the spring mount. I don't show any obstructions in the way but if you do have any then you make need to make an opening, you shouldn't have to drill through metal or anything though.

expert reply by: Conner L