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 7 other vehicles, including the 2014 BMW X6, 2013 BMW X6, 2012 BMW X6, 2011 BMW X6, and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

51 2 190 , see 51 2 190 DOOR LOCK TENSIONER .

Necessary preliminary tasks:

Remove rear section of power window unit, see 51 33 000 Removing and installing (replacing) power window unit in left or right front door .
Driver's side only:
Remove cover on outside handle, see 51 21 181 Removing and installing/replacing cover on outside handle with lock cylinder .

Disconnect Bowden cable at bottom (1) and top (3) from door lock (2).

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

Installation:

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

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

Seal (4) must be correctly fitted on Bowden cable.

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

Fig 1: Identifying Door Lock, Bowden Cable And Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip lock knob control rod (1).

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

Fig 2: Identifying Lock Knob Control Rod And Plug Connection

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Version with Soft Close Automatic:

Disconnect plug connection (1).

Release screws (2).

Fig 3: Identifying Plug Connection And Screws

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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).

Fig 4: Identifying Door Lock, Corner And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Adapter switching socket (4) must be correctly engaged.

Door wiring harness must be correctly laid in guide (2).

Fig 5: Identifying Seal, Door Lock And Switching Socket

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Version with Soft Close Automatic:

Make sure Soft Close Automatic drive (1) is installed in correct installation position. Control line (3) must not be twisted around Bowden cable (2).

Make sure control line (3) is correctly laid in guides (4).

Fig 6: Identifying Control Line, Soft Close Automatic Drive And Guides

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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 7: Identifying Door Lock Screws

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).

Fig 8: Identifying Door Lock And Knurled Screw
Courtesy of BMW OF NORTH AMERICA, INC.
Tighten down door lock screws, tightening torque 51 21 1AZ , see 51 21 FRONT DOOR LOCKS HANDLES .