Shimmy & Conrtrol Arm Bushings
Some folks below have mentioned possibly replacing control arm bushings. My experience with control arm bushings is that they cause shimmy or vibrations only on braking when the bushing is called on to take the thrust of de-acceleration. This is a VERY common BMW problem and I fixed my M6 by installing urethane bushings. But if the shimmy occurs all the time (not just on braking) then I don't think control arm bushings are the issue. I would look at the drive shaft bushings or U joints.
Some folks below have mentioned possibly replacing control arm bushings. My experience with control arm bushings is that they cause shimmy or vibrations only on braking when the bushing is called on to take the thrust of de-acceleration. This is a VERY common BMW problem and I fixed my M6 by installing urethane bushings. But if the shimmy occurs all the time (not just on braking) then I don't think control arm bushings are the issue. I would look at the drive shaft bushings or U joints.
