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

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required

NOTE: For special tools, refer to BODY EQUIPMENT - SPECIAL TOOLS - 645CI (E63) .

51 2 190

Necessary preliminary tasks:

Remove door window glass
Release power window unit in rear area only
Remove Bowden cable for inside door opener.

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" ends here.

Fig 1: Disconnecting Bowden Cable At Bottom

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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: Disconnecting Locking Rod From Door Lock

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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 leakage and electrical malfunction: Pull door lock (2) with special tool into corner (3), see Fig 6 and Fig 7.

Fig 3: Removing Door Lock

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 4: Inserting Inside Door Lock Correctly Into Paddle Of Lock Cylinder

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Installation:

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

Fig 5: Installing 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: Installing Door Lock
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).

Fig 7: Pretensioning Door Lock With Knurled Screw

Courtesy of BMW OF NORTH AMERICA, INC.

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, refer to 51 21 1AZ in BODY EQUIPMENT - TIGHTENING TORQUES - 645CI .