well im the 4th owner and i noticed mine was about to break a few months back while checking over everything while the car was up on the lift doing an oil change. my car is a 2006 325xi with manual transmission and i had about 140k. the pervious owner for mine was a friend that put a hard 10k on it. i coined it up to that and mileage seeing as the front universal had no play at all. i also believe that the fact that the motor is constantly adjusting the amount of power from front to rear plays into the wear as well.
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