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BMW Shake or Vibration Under Acceleration – Center Bearing, Flex Disc

February 15, 2011

This answer is applicable for many BMWs in addition to the one listed below.

How’re you doing Otto,
A while back you were assisting me on diagnosing my issues with my BMW 525i. I was having issues with my transmission and you said it sounded like a transmission slip after describing the issues. I finally was able to take it to a transmission shop and have the transmission changed. Wasn’t cheap but got it done. Now the car runs good again but my issue now is that it still shakes when I accelerate from a full stop. The gears handle great but when I’m taking off from a full stop the car vibrates until about the 20mph mark or so then it handles great. I’ve changed the transmission (rebuild) and flex disk so far.
Any idea on what I need to get from your warehouse? Thanks in advance!

Glad to hear that you’re back on the road.
If the driveshaft center-bearing has not been replaced (and the flex-disc has been replaced), we would suspect that this is likely the source of the current vibration, under acceleration. We would assume that the vibration is heavier under heavier acceleration and if you lessen the acceleration (ease off the throttle) the vibration reduces or goes away.

Center bearing for your 525i:

Center bearings and driveline components (all models):

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