HELP!!! My C4 Fab Bumper/Lift Kit Combo Threw Off the Pre-Collision Sensor. I have NO cruise control & Toyota won't do anything...

Daily driving 35s on the Tundra: what I wish someone had told me first

GhostRunnerTundra · 2026-06-11T01:05:08+00:00

I love my 35s and I'd put them on again in a heartbeat. But there's a handful of things I wish someone had told me before I did it, so here's the honest version for anyone planning on daily driving theirs. First, don't go as aggressive with offset as you think on the Tundra. I'm running 0 offset without quite enough lift (2in front and 1in rear), and I've had to trim, then trim again, and I probably still need to trim more. If I did it over I'd either go a little less aggressive on the offset or do a real suspension replacement like the OME MT64s to get it sitting where it needs to be. If you go the cheap route, just be ready for some rub. Now the good part. The small rim, big tire combo soaks up an absolute ton of the road when you're daily driving. It has been so much more plush since I put them on, and honestly that alone is the reason I'd do it again. Here's the big warning though: do not listen to the dealership or the tire shop about your speedometer. I got two speeding tickets in quick succession. One of them I had cruise control set to 78 in a 70 and figured I was totally fine. Officer said he had me at 88. Now I'm fighting a fix it ticket and have to go get it corrected in person. Either get your speedo recalibrated or at minimum understand that it's going to be reading pretty far off. Last point, power. I honestly didn't feel like I lost much at all. It still has plenty of get up and go and is a riot off-road. MPG is harder to say since I now know my speed and mileage readings are off. If I assume the same rate of difference I'm seeing in speed, I probably lost 3 or 4 MPG, but I also went with the Falken Wildpeak AT, which I'm sure helps a lot on that front. Bottom line, I think the pros outweigh the cons, especially if you off-road frequently. But a lot of this is preference, so go in knowing the trade-offs. Anyone else dealt with the speedo being this far off after going up in tire size? Curious if recalibrating actually got people back to accurate or if it's always a little off.

3gunkenzie

New member

Apr 20, 2026

I have a MAJOR issue I need a tune for or help with. I put the C4 Fab bumper on my truck and did a 3 inch lift kit. The pre-collision sensors are now sitting high and I took it to Toyota for 5 HOURS, and paid hundreds of dollars, only for them not to be able to re-calibrate and align the sensors.... Now I HAVE NO CRUISE CONTROL and I don't have adaptive, which is whatever to me. I HAVE TO have cruise control. I also am getting the "lamp light" notification that I have an error and then I have to dismiss the error and then I get an error on my driving screen that I have to dismiss every 5 minutes about the sensor and call the dealership and basically I wanna scream. Does ANYONE know how to disable the pre collision sensor so I can just simply use cruise control again??

HELP!!! My C4 Fab Bumper/Lift Kit Combo Threw Off the Pre-Collision Sensor. I have NO cruise control & Toyota won't do anything...

3gunkenzie

New member

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