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

WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. 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 rear section of Power Window Unit

Driver's side only:

Remove Lock Cylinder Lock Cylinder

Unclip lock knob control rod (1).

Unlock and disconnect plug connection (2) at lugs (3).

Fig 1: Lock Knob Control Rod, Lugs And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Unhook Bowden cable (1) from door lock (2).

If necessary, release cable holder on door lock (2).

Installation:

Bowden cable (1) must be correctly engaged in locators in door lock (2).

Bowden cable (1) must be laid without kinks in bend to door lock (2).

IMPORTANT: Door cannot be opened if Bowden cable (1) is incorrectly laid.

Fig 2: Bowden Cable And Door Lock

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not damage door lock seal when removing.

Release screws (1).

Remove door lock (2) from inside.

IMPORTANT: To avoid leaking and electrical malfunction:

Pull door lock (2) with special tool into corner (3), refer to illustrations Fig 6 and Fig 7.

Fig 3: Door Lock, Screws And Door Corner

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Seal (1) on door lock (2) must not be damaged.

Fig 4: Seal And Door Lock

Courtesy of BMW OF NORTH AMERICA, INC.

E90/E91 driver's side only:

NOTE: Cover (1) protects against water ingress.

In event of problems with frozen door locks/lock cylinders, retrofit cover (1) on door lock (2) if necessary.

Fig 5: Cover And Door Lock

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Install door lock and insert screws (1), do not tighten down.
Slide special tool 51 2 190 into opened rotary latch until latch engages in first stage.

Fig 6: Door Lock, Screws And Special Tool (51 2 190)
Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Pretension 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 turn knurled screw (2) by a further 1 to 1.5 turns (max.) (risk of damage).
Door lock seal must rest uniformly on inner door plate (water ingress).
Tighten down door lock screws, for tightening torque refer to 51 21 1AZ in 51 21 FRONT DOOR LOCKS .

Fig 7: Door Lock, Corner Points, Knurled Screw And Special Tool (51 2 190)
Courtesy of BMW OF NORTH AMERICA, INC.