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Old 02-01-2013, 11:45 AM
runner999 runner999 is offline
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Location: Mass
 
Join Date: Jan 2011
Posts: 16
Mein Auto: E83 X3
I beleive what you are referring to maybe related to xDrive transfer case. My 2010 328i xDrive and 2007 X3 both have some drivetrain whine which seems to be common with the AWD xDrive models. The 2WD loaners I've had during maintenance visits did not have the drivetrain whine. The X3 did get rather loud at 45K miles and the rear diff was replaced which subdued the sound 80% but it still had some "whine" after the repair. I was told that is normal. The X3 guys have ton's of posts on this topic.
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