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      01-23-2013, 02:50 PM   #15
jetbill
First Lieutenant
 
Drives: E90 335 M-Sport
Join Date: Feb 2012
Location: tampa

Posts: 368
iTrader: (3)

Same issue here more noticeable on cold start to warm transition when the waste gate changes state.

Sounds like a valve tap or lifters. Dealer said normal but it started at about 26k miles. Under load its quite.
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