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      01-15-2013, 12:02 AM   #4
Tee-Dub
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Drives: 2008 135i
Join Date: May 2009
Location: Vancouver, WA

Posts: 753
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I don't have a JB4, but I'm pretty sure you have to use the BMS USB cable (if you bought one) and hook your computer up to the JB4 to get the codes.
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