51 21 035 Removing And Installing/Replacing Function Carrier On Left Or Right Front Door

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove front door trim panel . See 51 41 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT DOOR TRIM PANEL .

IMPORTANT: Risk of mixing up plugs for door lock and control unit!
Mark relevant plugs prior to removal.

Disconnect Bowden cable (1) . See 51 21 235 REMOVING AND INSTALLING/REPLACING BOWDEN CABLE FOR INSIDE DOOR OPENER ON LEFT OR RIGHT FRONT DOOR .

Disconnect plug connections (2).

Disconnect cable holder (3); if necessary, release cable tie.

Feed out door wiring harness through wiring harness opening (4).

Fig 1: Identifying Plug Connections And Cable Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Release quick-release couplings.

Remove function carrier.

Installation:

If necessary, replace defective quick-release couplings.

Make sure quick-release couplings are installed in correct position.

Fig 2: Rotating Quick-Release Couplings

Courtesy of BMW OF NORTH AMERICA, INC.

Quick-release coupling 1.8 mm grey
Quick-release coupling 0.8 mm white

Installation:

Seal on function carrier (sound insulation) must not be damaged.

Fig 3: Identifying Seal On Function Carrier

Courtesy of BMW OF NORTH AMERICA, INC.