I have exactly the same problem! And I haven't painted anything.
BMW's excuses each time:
1st - The brakes are glazed because I track the car (I don't). Rotors cleaned.
2nd - The detail guy is leaving a greasy film on the rotors. Rotors cleaned again.
3rd - The subframe bushings are broken. New bushings and rotors cleaned for 3rd time.
Guess what.......still making the noise!
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2011 135i N55 | Black | M Sport | DCT | Sunroof | Pro Nav | Alpine Hi-Fi | Commbox | Tint | blah blah
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