51 21 090 Remove and install/replace the door lock of front door on the left or right

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

51 2 190

Necessary preliminary tasks:

Remove SOUND INSULATION ON FRONT DOOR

Disengage Bowden cable (2) from outer door handle at marked position.

Installation note:

Driver's side only:

Make sure locking pin (1) is correctly seated in mounting of door lock (3).

Fig 1: Disengaging Bowden Cable From Outer Door Handle

Courtesy of BMW OF NORTH AMERICA, INC.

Lever out locking rod (1) and set aside.

Unfasten plug connection (2) and disconnect.

Release screws (3).

Fig 2: Identifying Door Locking Rod And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Insert door lock (1) and turn in screws (2) but do not tighten
Slide special tool 51 2 190 into opened rotary striker until striker engages in first stage

Fig 3: Installing Special Tool (51 2 190) Into Rotary Striker
Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Pre-tension door lock (1) with knurled screw (2) until special tool 51 2 190 just contacts corner points (3)
IMPORTANT: To tension door lock (1), it is only permitted to tighten knurled screw (2) by a further 1 to 1.5 turns (max.) (risk of damage).
Door lock seal must rest uniformly on inner door panel (water ingress).

Fig 4: Identifying Door Lock, Knurled Screw And Special Tool (51 2 190)
Courtesy of BMW OF NORTH AMERICA, INC.
Tighten down door lock screws, tightening torque 51 21 1AZ .

Feed out door lock (2) out past guide rail of power window regulator (1) via door aperture.

Fig 5: Identifying Door Lock And Power Window Regulator

Courtesy of BMW OF NORTH AMERICA, INC.