Has any owners of the f80 m3 had any problems with the rear disc covers catching/rattling. I’ve had mine replaced but the problem has come back ,mainly if you hit a bump,or is it another issue and the main dealer can’t find it .
There was the stones getting caught in the shields issue, but I just pushed the guards back with my hand and it went away after the first 2000 miles the next 88,000 I never heard a whisper from them.
Have you had the wheels off and had a look yourself?