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      05-17-2012, 02:05 PM   #10
Drives: '06 E90 330i
Join Date: Apr 2010
Location: Brighton, IL

Posts: 537
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I thought those aftermarket systems required that you have the original head unit installed in the trunk. At any rate, I would think that simply disconnecting the unit would cause it to not show up in the UIF (along with anything else on the MOST bus) and allow BMW dealers to run their update. You would miss any updates to any ECUs on the MOST bus, but that should get you the recall update.
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