51 22 001 Replacing door detent (lock striker), rear left or right
WARNING: This page is about a different car, the 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
Operation up to "cover on rear door detent" is identical to:
Replacing front left or right door detent .
Unclip cover (1) with special tool 00 9 317 from door detent (2) and remove towards front.
Installation:
Catches (1) on cover (2) must not be damaged.