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      08-16-2011, 01:50 PM   #9
DavidZ
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Drives: '11.5 E90 M3
Join Date: Apr 2011
Location: Maryland USA

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I have the standard Hi-Fi system, and although I've upgraded my amp and speakers, I'm quite convinced this sound came from the head unit. I also don't think it was a physical problem like a wire getting shorted; I think this car is so "computerized" that sometimes the software acts up and causes things like this.
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-David
'14 Honda CR-V [Monday-Friday]
'17 Chevy SS 6MT [Saturday]
'11 BMW E90 M3 6MT [Sunday]