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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1242 (Electrical Drives - Repair) >> 31 Drive, Seat Adjustment >> 67 31 640 Removing and Installing/Replacing Drive For Backrest Head Adjustment (Comfort Seats In Rear Compartment)

67 31 640 Removing and Installing/Replacing Drive For Backrest Head Adjustment (Comfort Seats In Rear Compartment)

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Remove rear seat.  See 52 25 010 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT REAR SEAT .

Detach retainers (1) in area (2).

Turn back backrest cover (3) in direction of arrow slightly.

Fig 1: Detaching Retainers & Turning Back Backrest Cover Slightly
G04769183Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: For purposes of clarity, Fig 2 shows backrest cushion section removed.

Disconnect plug connection (1).

Release screws (2).

Detach drive for seat head adjustment (3) from drive shaft (4) and remove in direction of arrow.

Fig 2: Removing Drive For Seat Head Adjustment From Drive Shaft
G04769184Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Make sure spacer washers (1) are correctly seated.

If necessary, fix spacer washers (1) in place on metal tabs (2) of drive for backrest head adjustment (3).

Fig 3: Identifying Spacer Washers, Metal Tabs & Drive For Backrest Tilt Adjustment
G04769182Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: 

Initialize  drive unit for backrest head adjustment. See 67 31 ... NOTES ON INITIALIZING ELECTRIC SEAT SERVODRIVES