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      01-03-2013, 10:16 AM   #2
Mark M
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Drives: E30M3 E83X3 E90335D
Join Date: Aug 2007
Location: Lancaster, PA

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Good question.....I'm aslo interested as I have an '05 X3 with the original battery.

My gut is telling me the '05 pre dates all the crazy technology about battery registration since it is based on e46 3 series archetecture.