51 21 003 Replacing door detent (lock striker), front left or right

Release screws (1) and remove door detent (3).

Installation: 

Basic adjustment via crosswire on B-pillar (4) and notches (2) on door detent (3).

Tightening torque refer to 51 21 3AZ in BODY EQUIPMENT - TIGHTENING TORQUES - 645CI .

Adjust door detent.

Fig 1: Removing And Installing Door Detent (Lock Striker)

Courtesy of BMW OF NORTH AMERICA, INC.