Quote:
Originally Posted by a4nut
My e90 had a vibration under braking, and the solution was new control arm bushings. Completely solved the issue, so if "cleaning" the rotors doesn't solve it you may check those.
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Yes that can be but
I think the brake rotors especially for cars that sit a long time has a higher likelihood of being the cause so if turning or replacing the rotors doesn't solve it then someone can look down the list of lower probability items. Most 1Ms are lower mileage and sit for long periods of time not to mention that BMW even noted rotor corrosion in their manual and it is something I have experienced. The rotor not warped but corroded from winter parking and causing vibration under braking. I would just hate to see someone replacing bushings without first checking out the most obvious thing.