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      06-13-2013, 06:20 AM   #2
Duck
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Drives: F20 118i
Join Date: Jun 2013
Location: Russia

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That happen to N47D20 - might be chain or generator belt.
Advise you ask serviceman at official service.

If the reason of the noise is a chain - cost of fixing that might go to BMW as this is typical problem with N47.