 I recently bought a used 02 X5 4.4, I wished I'd read these articles first.  One person said he had problems with the mirror and seat memory -- ditto here.  I have wasted time on several trips to the dealer to be told "We can't find a problem."  No code found.  I can't get a trailer hitch because they're on back order.  I cannot get an aftermarket rear entertainment system because no one has any positive experience getting them put in.  However, it is a mechanical beast.  It is a jack-up sports car and it moves.  Some days I think about getting rid of it but when I clean it up, I like it, and other do too.