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      08-17-2015, 09:55 AM   #10
Leonardo629
Lieutenant Colonel
Taiwan
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Drives: 2013 M3 Coupe
Join Date: Sep 2006
Location: Taiwan

iTrader: (10)

I have to say the clunk is normal because my '13 with 15k mile does it from time to time, I have to say only during cold starts. It sounds like an "initialization" sound.

The rattle/scratchy sound could be from your belt I believe..make sure your MS pulley is on tight, and the belt is not too loose.
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