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      11-15-2010, 01:30 PM   #2
Lexington
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Drives: 2008 135i Blue Water
Join Date: May 2008
Location: South Carolina

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I had something similar and checked all around the inside of the trunk and couldn't find the problem. I received a trunk mat as a gift and after putting in the mat the noise went away. My theory is the noise was coming from the cover over the battery storage compartment bouncing up and then down when hitting a bump.
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