Thread: Popping noise
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      07-30-2011, 11:08 PM   #30
ken1137
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Drives: BMW S1000XR
Join Date: Jun 2011
Location: Gilbert, AZ

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2009 e90 335i  [6.40]
I have read many posts about this issue and thought my car was free and clear! Not so fast...I have heard the popping sound three times since the temps have been higher. I dont believe it is related to the AC (on) as it has popped with the windows down and AC off. The knocking sound only occurs when I hit a bump in the road, not every bump, large or small, no rhyme or reason. Damn!
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