We all know the ample stories of the B5 and B6/7 S4's with their turbo's blowing and engine pulling for any minor repair and the large price tag that goes along with those repairs. However the M3 has less known troubles that are constantly brought up on the CL as it is a well known darling. Anyways please bring out the troubles/common expenses that go along with being an M3 owner. Thanks!
PS: Anyone that wants to help with rule one would be great even though there are a million pic posts about M3's