Quick update here. Went out to start the X and it started then died right away. Let it sit for about 20 minutes and still no start. Started reading some threads here on Xoutpost and decided to try my spare key. Bingo! Okay. Was it a fluke?I'm going to start using this key for a while and see if I have issues.

I'll report back!

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2004 X5 4.4 Build 01/04 Alpine White on Schwarz Dakota Leather, Anthracite Headliner
Xtrons Android HU, SPORT PKG, COLD WEATHER PKG(W/REAR HEATED SEATS AND HEATED STEERING WHEEL), CONVENIENCE PKG, FACTORY HITCH