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      12-23-2011, 11:23 PM   #15
csquared013
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Drives: Arctic metallic 2006 330xi
Join Date: Nov 2009
Location: rochester, new york

Posts: 69
iTrader: (1)

my mothers 328 had a humming problem that sounds just like that with pitch increasing as speed increases. ended up being diagnosed as an issue with the front differential unfortunately. gl with finding a solution!
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