61 12 210 Replacing wiring harness in left or right rear door (long version)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Close rear side window completely
Disconnect battery negative lead .
Remove rear door trim panel . See 51 42 001 REPLACING REAR LEFT OR RIGHT DOOR TRIM PANEL (LONG VERSION OR FROM 03/2007) .
Remove sound insulation in rear door . See 51 48 070 REMOVING AND INSTALLING/REPLACING SOUND INSULATION ON LEFT OR RIGHT REAR DOOR .

Disconnect plug connection (1).

Disconnect door wiring harness (2) at retainer (3).

Installation:

Make sure door wiring harness (2) is correctly laid.

Fig 1: Identifying Door Wiring Harness, Retainer And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: For clearer illustration, shown with front door removed.

Release screw (1), fold door wiring harness plug on B-pillar (2) downwards slightly and remove.

Unlock plug connection behind and disconnect.

Pull rubber grommet (3) in direction of arrow out of rear door (4).

Feed out door wiring harness towards front to B-pillar and remove.

Fig 2: Identifying Rubber Grommet, Screw And B-Pillar

Courtesy of BMW OF NORTH AMERICA, INC.