My wife jokes that our X5 has a spare cash sensor in it somewhere; whenever we have some spare cash, something breaks and we have to pour some $$ into it. Sounds like yours might have that feature too.

__________________
2001 X5 Sport 3.0/5-speed
1998 318ti/5-speed
1988 735i/5-speed
1984 528e/5-speed (soon to be M20B25-powered 525i!)