Originally Posted by chicagojeeper
I have read many different views and points on this subject. I was reluctant too. I bought a 2012 WK2 back in June and have already put a JL stealth box (highly recommend for clean look and very impressive low end), amp, and I picked up a 730n off EBay (not installed yet, have to have dealer flash to VIN). There is a law (magnusson/moss(spell check)). The law was enacted to protect consumers warranty rights where if they want to install aftermarket parts, they can and it will not void warranty provided that during the install, there is nothing that may cause failure. I decided to take that risk (if any?). I wish you the best on your install and or decision.
The M-M act basically says that they have to prove that whatever you did caused the failure. Given that the dealerships are the experts on the cars in the eyes of the law, it's not had for them to do in most cases.
If you install aftermarket amps and subs and your engine implodes, M-M will keep them from refusing to warranty the engine. If you have an alternator meltdown they say was caused by your amps pulling more power than is budgeted for external accessories, you're going to have no protection from M-M.
At the end of the day, if the dealership and manufacturer are fighting you over being covered by M-M or not, you're already going to lose.