Quote:
Originally Posted by trsbmw
I had the same type of leak on the input flange side of the diff. Took it to the dealer, the seal was replaced. I picked the car up, there was a bad vibration introduced at 65 mph. The driveshaft was replaced next. The vibration was still there. Next BMW secondary support recommended the entire differential be replaced. Done, and problem solved, with a new differential at 10k miles...
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Wow. I'm going to hope it's a one time fix, but I'm prepared now in case it's not.