[spekterg35]

Hey guys. New to the forum, but thought i would weigh in on this topic.
Their are many warranty laws in effect to protect consumers from the big bad manufacturers. Heres a couple links to a SEMA article and to the Magnuson-moss warranty act.

http://www.sema.org/main/semaorghome.aspx?ID=50096
http://www.sema.org/Main/SemaOrgHome.aspx?ID=50100\

Simply put, a warranty can't be voided by a manufacturer unless the aftermarket part installed, or a fouled installation, caused the problem which the consumer is trying to have repaired under warranty. Case by Case basis. I have had to fight this battle before, and knowing the laws for yourself will help you should you find yourself in this position. SEMA has gone through a lot of trouble to make sure we can mod to our hearts content without fear.
BUT, be reasonable in choosing your mods. Major power adders like Turbo/Superchargers are a riding a fine line, but may be safe if installed and used properly. Also, things that are known to be defective to the manufacturer, cant be blamed on the aftermarket part. If you break a rod and have a supercharger, the dealership cant say the supercharger caused the rod breakage if there is already a technical service bulletin (TSB) out on those particular rods.

 

[spekterg35]

The warranty laws i quoted above are federal.
The dealerships aren't going to let you know your consumer rights (at least not in my experience). You have to let them know that you are aware of the laws and that you are willing to fight for your rights. If it were a civic, i wouldn't care, but with a lexus i would definitely be willing to take it to court. Then again, outright refusal to work on your car might be a different story. The dealerships probably reserve the right to refuse service for their own reasons. Most consumers, just turn tail when they meet resistance at the dealership or give in when they are told they have to pay.
It would be nice if one of the dealers on the forum would chime in with their opinion.