It showed up on my '03 X5 about a month ago. Once only. After that, it went away, and I haven't seen it since. The truck is running fine. So unless it happens again, you're probably okay. If it comes on and stays on, then you may have a larger problem.

Search the threads here for a similar topic. It's been discussed several times.

Dave

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2003 4.4i (The X5 is WAAAY more fun than my Jeep used to be... )