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      12-19-2011, 02:15 AM   #1
rdollie
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Drives: 2009 M3 DCT Sedan
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Help, where's the tin can??? (cowbell)

This is maddening. About 3 weeks ago I first noticed what sounds like the dead ringer for what I imagine a tin can dragging off my rear suspension would sound like. I noticed it pulling up the driveway an into the garage. I look sort of silly crawling all around the car for a mystical dragging can I couldn't find. I heard it probably 2 or 3 times since so about 1 in 5 times. It happened again today as I was backing down the driveway and it sounded even louder. With my window down I'd estimate it could be heard a block away as I drove off. It disappeared within 10-15 seconds after I got up to speed.

Anybody have a clue? My gut says it's somewhere in the exhaust system but I don't know where and don't see an obvious issue. I'm heading to the dealership later this week for the rear diff. fluid change so any help more accurately describing any potentially known issue in advance of the visit is greatly appreciated.

Thanks.
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      12-19-2011, 03:36 AM   #2
SenorFunkyPants
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Its a stone caught up between a rear brake disc and the rain guard.
It will fall out usually just as you arrive at the dealership to have it checked out.
Reversing can often dislodge it.
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      12-19-2011, 03:44 AM   #3
NorCalE92M3
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This same noise happened to me, really annoying. I got it to stop with a few aggressive stops from 60.
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      12-19-2011, 07:26 AM   #4
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do a search:

http://www.m3post.com/forums/showthread.php?t=490597
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