Originally Posted by Martin_D
It is the brake boost assist. This happens to fast drivers in the E9X M3. The system pulls vacuum from anywhere it can and you get an inconsistent pedal.
AE performance is working on a fix for this. It happened plenty of times in my car, happens with their car as well. Anyone driving fast knows about this.
So whatès the fix for this...
Im pretty sure I experienced this on hard braking last week and I was wondering if my brake fluid was not properly bled.