51 21 003 Replacing door detent (lock striker), front left or right
WARNING: This page is about a different car, the 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
Release screws (1) and remove door detent (2).
Installation:
If necessary, carry out basic adjustment by way of notches (3) on lock striker (2).
Notches (3) must be vertical to B-pillar.
Tightening torque 51 21 2AZ .