Thread: Battery Error
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      05-13-2013, 09:34 AM   #4
bm5bullit
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Drives: 2021 BMW M340i
Join Date: Jun 2009
Location: Texas

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Went thru this during the install process and had the tech properly connect the power to the right source. Found out by making a few calls to BMW techs that the most reliable key switch power is one wire coming out of the trunk fuse block. Works like a charm. BTW, almost all other key switch power sources will confuse the DME due to the proximity logic of the key fobs.
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