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 8 other vehicles, including the 2010 BMW M6, 2010 BMW 650i, 2009 BMW M6, 2009 BMW 650i, and 2008 BMW M6. 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 door window glass . See 51 32 170 Removing and installing/replacing door window glass, front left or right .
Release power window unit in rear area only. See 51 33 000 Removing and installing (replacing) power window unit in left or right front door .

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

IMPORTANT: Bowden cable must be correctly located in mounts on door lock (2).
Seal (4) must be correctly positioned on Bowden cable.

NOTE: The operations for "Removing Bowden cable from door lock" end here.

Fig 1: Disconnecting Bowden Cable

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Unlock plug connection (1) at lugs (2) and detach from door lock (3).

Unclip locking rod (4) from door lock (3).

Fig 2: Identifying Locking Rod, Plug Connection, Door Lock And Lugs

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IMPORTANT: Do not damage door lock seal during removal.

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), see Fig 6 and Fig 7.

Fig 3: Identifying Door Lock And Screws

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Driver's door only:

Installation:

Insert inside door lock (1) correctly into paddle (2) of lock cylinder (3).

Fig 4: Identifying Door Lock, Paddle And Lock Cylinder

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Installation:

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

Fig 5: Identifying Seal On Door Lock

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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 6: Identifying Special Tool And 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).

Tighten down door lock screws, tightening torque 51 21 1AZ . See BODY EQUIPMENT - TIGHTENING TORQUES .

Fig 7: Identifying Door Lock And Knurled Screws
Courtesy of BMW OF NORTH AMERICA, INC.