51 21 090 Removing and installing/replacing door lock on left or right front door

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, 2001 BMW X5, and 2000 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Remove sound insulation on front door. See 51 48 ... Removing And Installing/Replacing Sound Insulation In Front Door, Left Or Right .

Driver's side only:

Remove complete lock cylinder.

Disconnect plug connection (1) on door lock (2).

Fig 1: Disconnecting Plug Connection On Door Lock

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip ball head (1).

Detach Bowden cable (2) from support (3) on door lock.

Fig 2: Detaching Bowden Cable From Support On Door Lock

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove door lock (2) with linkage (3).

Installation:

Insert linkage for locking knob through opening in inner door plate.

Do not bend linkage (3).

Replace screws (1).

Tightening torque, see 51 21 1AZ in BODY EQUIPMENT - TIGHTENING TORQUES .

Fig 3: Removing Door Lock With Linkage

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Carry out function check only with door open.

Close rotary latch lock (1) with a screwdriver,
lock car with car key,
unlock car with car key,
open rotary latch lock (1) with outside door handle,
if rotary latch lock (1) opens, then O.K.
if rotary latch lock (1) fails to open
a new lock actuator must be fitted.

Fig 4: Installing Lock Actuator
Courtesy of BMW OF NORTH AMERICA, INC.