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      10-27-2013, 12:51 PM   #8
MilehighM3
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Drives: Harrop E90 M3
Join Date: May 2011
Location: Colorado Springs

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2009 E90 M3  [6.50]
It's most likely the slave cylinder that has failed. It's on the transmission itself and does the clutch actuation. The master cylinder is mounted near the top of the clutch pedal. If the slave did fail/blowout, there's a very high possibility that the clutch is soaked in brake fluid and will need replacement. Since you have an 08 that would mean you'll need a flywheel as well since they updated the clutch and flywheel assembly for 09 models to reduce noise and the old parts are no longer available.
This is worst case scenario, but has a high likelihood of being the end result here. If the slave is a covered component on your warranty, you're golden. If not, well it could be a pricey day at the shop. Let us know your outcome.
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