Necessary preliminary work:
Release screws (1).
Release plug connection (3) and disconnect.
Detach servodrive for ventilation flaps (2) in direction of arrow from heater/air conditioner.
Replacement:
Servomotors must be readdressed in the event of replacement! Addressing can only be carried out with the BMW diagnosis system.
Service functions:
BMW X3 Service & Repair Manual > Electronic switching or control units: Replacing crankshaft pulse sensor (N20, N26)
IMPORTANT:
Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC
DISCHARGE (ESD PROTECTION) .
Necessary preliminary tasks:
Read out the fault memory of the DME control unit.
Switch off ignition.
Remove STARTER MOTOR.
Unlock connector (1) and remove.
Release screw (2) ...