Excellent response Blackwatch, well said.There has been many questions about warranties. The warranty act says that the modification has to be proven to cause the problem, so... if you add some Audi style lights, and you have an electrical problem, they could determine that the modification caused it. Adding a spoiler and drilling holes could void you paint warranty, do you see what Im getting at? The best this would be to talk to your dealer, because every case is different and the dealer makes the call when doing warranty work.
BW