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Old 12-31-2012, 07:32 PM   #6
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Join Date: Apr 2008
Location: Boston
Posts: 4,971
My Ride: 2003 325xi
^ just change the fluid in both and periodically check for leaks. The diffs will most likely be fine until the fluid is no good or low.

Three bottles of synthetic 75w90, fluid pump, 4 crush washers, and a 14mm hex head socket is all you need.
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