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Home >> BMW >> 2008 >> M3 2D Convertible >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Equipment - Repair - E92/93 M3 >> Rear door locks & handle >> 51 22 090 Removing and installing/replacing door lock in left or right rear door

51 22 090 Removing and installing/replacing door lock in left or right rear door

Special tools required: 

See BODY EQUIPMENT - SPECIAL TOOLS (CONVERTIBLE/COUPE) or BODY EQUIPMENT - SPECIAL TOOLS (SEDAN) .

Necessary preliminary tasks: 

Unlock and disconnect plug connection (2) at lugs (1).

Unhook Bowden cable (3) from door lock (4).

Unclip lock knob control rod (5).

Fig 1: Identifying Lock Knob Control Rod
G06202582Courtesy of BMW OF NORTH AMERICA, INC.

Unhook Bowden cable (1) from door lock (2).

If necessary, release cable holder on door lock (2).

Installation: 

Bowden cable (1) must be correctly engaged in locators in door lock (2).

Bowden cable (1) must be laid without kinks in bend to door lock (2).

IMPORTANT: Door cannot be opened if Bowden cable (1) is incorrectly laid.
Fig 2: Identifying Bowden Cable And Door Lock
G06202569Courtesy 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 leaking and electrical malfunction:
Pull door lock (2) with special tool into corner (3), see Fig 5 and Fig 6.
Fig 3: Identifying Door Lock And Corner
G04749714Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

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

Fig 4: Identifying Seal And Door Lock
G04749715Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Fig 5: Identifying Door Lock And Screws
G04749716Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

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).
Fig 6: Identifying Door Lock And Knurled Screw
G04749717Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Check function of child lock (1) on door lock (2).

Fig 7: Identifying Child Lock And Door Lock
G04788595Courtesy of BMW OF NORTH AMERICA, INC.