67 31 630 Removing and installing/replacing backrest adjustment motor (comfort seats in rear passenger compartment)

WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work

Partially remove left or right backrest cover . See 52 25 411 REPLACING BACKREST COVER FOR LEFT REAR SEAT or 52 25 412 REPLACING BACKREST COVER FOR RIGHT REAR SEAT .

Installation note:

Powerlok screws must be replaced and must not be reused
Powerlok screws are mechanical screw locks with trilobular threads

Installation note:

Microencapsulated screws (Loctite) must be replaced and may not be reused
Screw connection must be completed within 20 minutes (start of curing)
Microencapsulated screws must not be retightened
Clean thread of nut beforehand in event of repeated use

Unfasten plug connection (2) and disconnect.

Release screw (1).

Installation note:

Replace screw (1).

Tightening torque 67 31 16AZ .

Fig 1: Identifying Plug Connection And Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Installation note:

Replace screws (1).

Tightening torque 67 31 15AZ .

Remove drive unit.

Fig 2: Identifying Drive Unit Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Carry out FUNCTION CHECK WITH ADAPTER CABLE .

Replacement only:

INITIALISE backrest adjustment motor.