I have had battery issues in both my X5s.

My '02 4.4i with the ICE would go dead in a very short time if I listened to the radio with the doors open while drying it from a wash job. (Forget about the overhead video system...it was a bona fide battery killer if watched while the car wasn't running.) The gauges and warning lights would operate erratically for a little while until the battery got recharged, but all would be fine at that point.

My '04 3.0i had only been in the family for a week when I ran the battery dead by having all the doors open while cleaning the interior. I've had to put it on a trickle charge twice in the past month and I fear the battery is going, and going quickly.

I'm thinking it could just be coincidence, but I also think the electrical system of an X5 - ANY X5 - are high maintenance. In your case, however, it sounds like there may be something else going on besides the battery. I'd check to see if there is something draining it down, and also it wouldn't hurt to check the alternator as well. Good luck!

Mike

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