Originally posted by irmiger
I may be mistaken, but from what I understand, the dealer still has to prove that the modification caused the failure! Just saying that you put on sway-bars or lower-profile tires voids the warranty is false. The modification has to be a contributing cause or it doesn't count.
The way I read it, (and from experience where a K&N FIPK caused a warranty denial), it's up to *you* to prove that the aftermarket part *didn't* cause the failure, not the dealership to prove it did.
So, I'm not saying you will get a denial, but don't expect the dealership to take any and all mods in stride as some won't.
Granted, you can fight it, but sometimes it's not going to be worth it, and the avenues you can use aren't amazingly helpful (BBB for instance--it's typically useless).