Mine had a code 71. Seat occupancy detector. I used a bypass to clear the code. The air bag will deploy even if no one is sitting on it. Better to deploy than not in an accident. To clear the seat belt alarm, an extension insert is used.

Insert a belt latch into the buckle. Does the code change?

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'06 X5 3.0i - bought @143,123 miles (12/26/20)