That's pretty much what I said earlier, more than once (re-read it) - Re: the bold underlined part ^^^.Untrue. If it turns out that the aftermarket part was either defective itself or installed improperly, AND it caused damage to another part that is covered under warranty, only then does the manufacturer have the right to deny coverage for that part. The burden of proof is on the manufacturer.
If an aftermarket oil filter failed and caused the engine to blow-up, the dealership has the right to deny the warranty on the blown-up engine because the root cause was the non-OEM filter. If you were selling cars, would you cover all the damage under warranty done by inferior failing parts being used on the vehicles? I sure wouldn't.
As noted before, if someone uses an non-OEM part, the dealership can not automatically deny or cancel the warranty on the entire car. In other words, if someone is using a Purolator filter, the dealership can't deny warranty on a wheel bearing that went out. But if the oil filter was proven to blow-up the engine, then the dealership can deny the warranty on all the damage that the failed filter caused. As mentioned before, if an oil filter failed and caused damage, it would be pretty easy for the dealership to prove.
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