What is this rattle/noise?

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		BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) > Technical / Specific Topics > 135i Turbo Engine (N54 / N55), Exhaust and Drivetrain Modifications
What is this rattle/noise?

09-14-2013, 09:44 AM	#1
friedymeister Private 5 Rep 73 Posts Drives: 2011 BMW 135i Convertible Join Date: Jul 2009 Location: Westchester NY iTrader: (0)	What is this rattle/noise? I've noticed this rattle/high pitched noise since I got my car. It has about 15k miles on it and occurs at start up and idle. Any ideas?
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05-10-2023, 10:05 AM	#2
friedymeister Private 5 Rep 73 Posts Drives: 2011 BMW 135i Convertible Join Date: Jul 2009 Location: Westchester NY iTrader: (0)	Is this what a failing idler pulley sounds like?
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