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

NOTE: Close window on front door and open all other windows. Disconnect battery negative lead, refer to 12 00... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY . Remove door trim panel, refer to 51 41 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT DOOR TRIM PANEL . Remove outside handle, refer to 51 21 170 REMOVING AND INSTALLING OR REPLACING OUTSIDE HANDLE FROM LEFT OR RIGHT FRONT DOOR .

Version with side airbag in front door:

CAUTION: Remove and install/replace airbag module on front left or right door:

For year model 1999 to 2000, refer to SIDE AIR BAG MODULE .
For year model 2001, refer to SIDE AIR BAG MODULE .
For year model 2002, refer to SIDE AIR BAG MODULE .
For year model 2003, refer to SIDE AIR BAG MODULE .

NOTE: To release or partially detach sound insulation, follow procedure in 51 48... REMOVING AND INSTALLING/REPLACING SOUND INSULATION IN FRONT DOOR, LEFT OR RIGHT .

Partially detach sound insulation at rear and secure with adhesive tape (1).

Fig 1: Partially Detaching Sound Insulation At Rear

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Remove connector (drive on door locking unit) by pulling downwards and backwards.

Fig 2: Removing Connector For Drive On Door Locking Unit

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Disconnect Bowden cable nipple (1) and Bowden cable guide (2) from door lock (3).

Fig 3: Disconnecting Bowden Cable Nipple

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Unplug plug connection (micro-switch).

Fig 4: Unplugging Plug Connection (Micro-Switch)

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Unfasten clip (1) (Bowden cable on inside door handle).

Unfasten screws and pull door lock downwards to remove.

Fig 5: Unfastening Clip For Bowden Cable

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Installation:

Lug on support (for paddle) must be located bottom center.

Fig 6: Aligning Lug On Support

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Installation:

Carefully insert support (1) (for paddle) on door lock carefully upwards into paddle (2) (lock cylinder).

Fig 7: Inserting Support Into Paddle

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Only replace:

Lift out locking unit (1) and pull drive (2) (door locking unit) upwards from door lock.

Fig 8: Lifting Out Locking Unit

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Only replace:

Disconnect rods (1) and (2).

Fig 9: Disconnecting Rods

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Only replace:

If necessary, unfasten screws.

If necessary, remove retaining plate (1) and lift out micro-switch (2).

Fig 10: Removing Retaining Plate And Lifting Out Micro-Switch

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Courtesy of BMW OF NORTH AMERICA, INC.