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      04-14-2012, 10:00 PM   #10
MilehighM3
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Drives: E90 M3
Join Date: May 2011
Location: Colorado Springs

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You'll probably have to get it diagnosed by a dealer or someone capable of checking the dsc faults. Reading dme faults won't get you what you need to be positive. Transfer case motors are fairly common, especially in tuned cars with more torque than stock. That motor works over time. Short of pulling the motor off and disassembling it to check the gears, fuses are about all you can check in this case.