I am not positive but it sounds like you are talking about the rear subframe bushings. i had to replace mine, but luckily we had the correct tool for the job and it only took about 30 min for both. the tool is about $300. there was a lot of talk of how to do this without the tool last week. might want to do a search for sub-frame bushings hope this helps ~artie I own a 1985 528e. Problem is a noise and a slight jerk when accelerating. I think i already localized the problem, but i don't know the name of the part, and cannot imagine the procedure how to replace it. Let me describe the part. It is a bushing which goes vertically and connects rear axle carrier with the frame. This bushing is damaged, and when car is moving the inner cylinder is moving up and down and hits the frame. I hope somebody can help me.