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      07-24-2020, 07:59 AM   #5
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Drives: 08 E92 M3
Join Date: Jun 2018
Location: Kingston

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Had the exact same noise, it's your belt tensioner and idler pulley. $400~$600 fix. Don't do what I did any wait, I ended up destroying a tensioner, and idle pulley and burned up a belt. It flung molten plastic from a burned up belt all over my engine bay. Took way longer to clean that shit up.
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