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Old 02-25-2010, 03:53 PM   #7
Superhiro
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Join Date: Aug 2006
Location: Washington DC
Posts: 3,136
My Ride: 2006 330ci ZHP
Very possibly an issue with your wheel bearing. Esp if there's any vibrations to go along with the thumping sound. A flat spot in a wheel bearing could cause the sound you're talking about as well.
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