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

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove SOUND INSULATION

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 Plug Connection At Lugs

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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

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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 leaking and electrical malfunction:

Fig 3: Pulling Door Lock Using Special Tool Into Corner

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

R51 3381 and R51 7594.

Installation:

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

Fig 4: Identifying Gasket And Door Lock

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Installation:

Install door lock and insert screws (1), do not tighten down.
Slide special tool 51 2 190 ADJUSTER into opened rotary latch until latch engages in first stage.

Fig 5: Installing Door Lock

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Installation:

Pretension door lock (1) with knurled screw (2) until special tool 51 2 190 ADJUSTER 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).

Fig 6: Installing Door Lock Using Special Tool (51 2 190)

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Tighten down door lock screws, tightening torque 51 22 1AZ .
Installation:

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

Fig 7: Checking Function Of Child Lock On Door Lock
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