Hence the lawyer part
Or you could remove the aftermarket part before taking your car into the dealership, if you think they are going to give you trouble for it.
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[Current] Tesla Model 3 Performance
[Retired] Audi R8 V10 6MT, BMW i3 BEV, BMW i3 REx, BMW Z4 sDrive35i DCT, BMW 335i Coupe 6MT