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 19 other vehicles, including the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2007 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Close door windows
Remove SOUND INSULATION in rear area only.

Security version:

Remove COMPLETE SOUND INSULATION

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 At Bottom

G03261496

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 2: Disconnecting Locking Rod Clip From Door Lock

G03261497

Courtesy of BMW OF NORTH AMERICA, INC.

Version with Soft Close Automatic:

Disconnect plug connection (1).

Unfasten cable tie (2).

Release screw (3) and nuts (4).

Tightening torque: see 11AZ in 51 21 FRONT DOOR LOCKS

Fig 3: Identifying Plug Connection, Cable Tie, Screw And Nuts

G04788550

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Do not damage door lock seal during removal.

Release screws (1).

Remove door lock (2) from inside.

IMPORTANT:

To avoid leakage and electrical malfunction:

Pull door lock (2) with special tool into corner (3).

See Fig 7 and Fig 8.

Fig 4: Removing Door Lock

G03261498

Courtesy of BMW OF NORTH AMERICA, INC.

Driver's door only:

Installation:

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

Fig 5: Inserting Into Paddle Of Lock Cylinder

G03261499

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Fig 6: Installing Seal On Door Lock

G03261500

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 7: Installing Door Lock

G03261501

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. See 1AZ in 51 21 FRONT DOOR LOCKS .

Fig 8: Identifying Pretension Door Lock With Knurled Screw

G03261502

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement with Soft Close Automatic:

Release nuts (1) and remove bracket (2).

Tightening torque: see 12AZ in 51 21 FRONT DOOR LOCKS .

Fig 9: Identifying Nuts And Bracket

G04788556

Courtesy of BMW OF NORTH AMERICA, INC.