51 21 140 Removing and installing/replacing complete lock cylinder in left or right front door

Lever out cap (1) and release screw underneath.

Installation:

If necessary, replace faulty trim (1).

Fig 1: Identifying Cap

Courtesy of BMW OF NORTH AMERICA, INC.

Pull off cover (1) with ignition key in direction of arrow with outside door handle (2) opened slightly.

Fig 2: Identifying Cover And Door Handle

Courtesy of BMW OF NORTH AMERICA, INC.

Version with light package:

Installation:

Make sure outside door handle light (1) is correctly positioned in area (2).

Guides (3) of outside door handle light (1) must be correctly seated in carrier for outside door handle (4).

Fig 3: Identifying Outside Door Handle Light, Guides And Outside Door Handle

Courtesy of BMW OF NORTH AMERICA, INC.

Remove catches (1) and detach cover (2) from lock cylinder (3).

Installation:

Catches (1) of cover (2) must not be damaged.

Paddle (4) of lock cylinder (3) must not be damaged.

Fig 4: Identifying Catches, Cover, Lock Cylinder And Paddle

Courtesy of BMW OF NORTH AMERICA, INC.