I found this but I cannot load the pictures from the WDS..

Electrical components

Switches

The switches are designed as contactless switches with Hall-effect elements. All switches feature a common ground (terminal 31) connection.

• Door contact
  The position of the rotary latch detected by a switch in order to determine the door position (open or closed).

Is this "door contact" in this list on real OEM?
http://www.realoem.com/bmw/showparts...28&hg=41&fg=40