Quote:
Originally Posted by KnightRyderx2
With that said if you needing warranty work and they find your aftermarket exhaust has contributed to or caused it, they can void your warranty then, but they will have to prove it. Like Tcoat said they can get pretty creative.
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This statement requires further clarification. As others have said, nothing you do automatically voids your entire warranty short of dunking the entire car into the ocean.
As KnightRyder stated, if a dealership determines that a modification you made caused a part to fail, they can... let's not say "VOID," let's say "DENY" to repair that specific part under warranty. It doesn't VOID your whole warranty.
An example: You slam your car to the ground on coilovers. A few months later, one of your rear axles breaks. You bring the car in for repair, and it is still well-within the warranty period. If your car was stock, the axle would be replaced for free. However, the dealership would likely point to your coilovers and say, "The reason your axle failed is because you've slammed your car to the ground, ruining the geometry of the rear suspension, and putting a whole bunch of added stress on your axles."
They wouldn't be incorrect in coming to that conclusion, and at that point it's all down to how nice they are as to whether or not they will replace the part under warranty, or make you pay for it since the only reason it failed is because of the coilovers you installed.
The rest of your warranty is still intact. For example, if your door falls off, they can't refuse to repair it under warranty because of your coilovers, because there is no way they contributed to that failure.
TL;DR, dealerships can refuse to cover specific parts under warranty, if they determine that the failure was the result of a modification you made to the car, but there is no such thing as a modification that voids your entire warranty up front.