Originally Posted by Fuzzz
Not sure about the E90, but on the E46 M3 and E60 M5, the ECU actually records the number of times you go over recommended break-in rpm, at two threasholds (med and high) and the number of times you hit the rev-limiter. Improper break-in could result in warranty hassles down the line.
hmmm very interesting~ Ill def. keep that in mind!
It feels like almost a invasion of privacy...