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      10-29-2009, 10:24 PM   #21
Bullitt
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Drives: 135i
Join Date: Apr 2008
Location: SF Bay Area

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2008 135i  [0.00]
^ Thanks for chiming in though. Was hoping to avoid the dealer.
The performance exhaust was installed a year ago by an experienced muffler shop, and this sound did not exist at all until the recent software update. The noise lasts for only a second and does not happen all the time, but it is indeed strange. It could be nothing, but maybe I should have it checked out.
Appreciate 0