Yo Numark: http://forum.e46fanatics.com/showthread.php?p=4531699
And also: http://www.pelicanparts.com/cgi-bin/...-7-518-628-M36
And for metalmukisha to get a picture, the sensor is $108 shipped. The job is a simple task. This is what someone posted on E46fanatics:
Originally Posted by murph1379
yikes, I paid like $350 to have this done by the dealer! Wish I'd known what was wrong!
Numark, I would still first check the wires and connections. Sometimes, however, $100 is worth the peace of mind in my opinion.