it wont void the warranty, and installation is not hard at all. All you need to do is find a power source to tap into and secure the changer and set up the modulator.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>