Originally Posted by M3Denver
TUNERS will blow your warranty!
Not exactly correct.
Dinan tunes (I guess he's a tuner) do not void your warranty. Dinan has some kind of agreement with BMW which keeps the BMW warranty in effect even with Dinan Mods. In fact, some BMW dealers will do DINAN tunes on your car.
I don't know that this is the case for everything Dinan offers, but, if you want some extra poop in the old M3 and your concerned about the warranty, check out Dinan.