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wtfmarine wtfmarine is offline
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Posts: 154
Join Date: Feb 2012
Car: 2007 BMW 335i
Default 08-29-2015, 04:29 PM

I just remembered something. I had a knocking thumping noise coming from the center of my dash and it ended up being a loose bolt on the plastic cover that holds the in cabin air filter. Might check in that area first. It was a random noise but usually on start ups.

07 335i sleeper - PT5858 single turbo - stock exhaust - stock wheels
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