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

Necessary preliminary tasks: 

• Partially remove LEFT OR RIGHT BACKREST COVER

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 Backrest Tilt Adjuster 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.

Replacement only: 

INITIALIZE  backrest adjustment motor.