BMW 7 Series: Removing And Installing/Replacing Forward/Back Seat Adjustment Drive Unit
Necessary preliminary tasks
- Raise front seat as far up as possible
- Remove TRIMS ON UPPER RAILS
- Procedure in event of faulty drive for forward/back seat adjustment:
Removing forward/back seat adjustment motor
Unfasten plug connection (1) and disconnect.
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Fig. 42: Identifying Forward/Back Seat Adjustment Motor Plug Connection
Unlock retaining tabs.
Lift drive (1) with flex shaft out of guide in direction of arrow.
Pull flex shaft on left and right out of gearing.
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Fig. 43: Pulling Flex Shaft From Gearing
Installing forward/back seat adjustment motor
Insert short flex shaft (1).
Attach rubber grommet.
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Fig. 44: Inserting Short Flex Shaft
Installation
Attach rubber grommet at 60º angle to connector housing.
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Fig. 45: Connecting Rubber Grommet At 60º Angle To Connector Housing
Insert long flex shaft (1) with sleeve tube (2) and rubber grommet in plastic part (3).
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Fig. 46: Identifying Long Flex Shaft With Sleeve Tube And Rubber Grommet In
Plastic Part
Installation
Attach assembly to motor at 60º angle to connector housing so that it cannot twist.
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Fig. 47: Connecting Assembly To Motor At 60º Angle To Connector Housing
Slide seat rail with opening forwards or back until bushing for flex shaft mounting of worm gear is flush.
Insert flex shaft.
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Fig. 48: Sliding Seat Rail Forward/Backward
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Fig. 49: Identifying Short Flex Shaft And Long Flex Shaft
Slide short flex shaft (1) into forward/back seat adjustment gearing square.
Bend long flex shaft (2) upwards and slide into longitudinal seat adjustment gearing.
Clip motor and flex shafts into carrier plate.
Installation
PTFE hoses are shrink-fitted onto end pieces.
Check that hoses are free from damage.
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Fig. 50: Identifying PTFE Hoses
Installation
- Make sure flex shaft is correctly fitted on motor
- Carpet must not get between seat rails and floor panel in area of attachment points (squeaking noises)
- Powerlok screws must be replaced and must not be reused
- Powerlok screws are mechanical screw locks with trilobular threads
- Insert all screws loose to avoid twisting
- Tighten down all screws to specified torque
Tightening torque 52 10 1AZ.
NOTE:
- Carry out FUNCTION CHECK WITH ADAPTER CABLE
Replacement
INITIALIZE backrest adjustment motor.
Replacing in vehicles with production dates up to 09/2009
- Carry out VEHICLE PROGRAMMING AND ENCODING
READ NEXT:
Drive, Heating/Ventilation/Air Conditioning
REPLACING FAN FOR THIGH SUPPORT ON FRONT SEAT
Necessary preliminary tasks
Remove padding for thigh support.
Remove separating net (1).
Lift out fan (2).
Fig. 51: Identifying Front Seat Thigh Sup
Drive, Slide/Tilt Sunroof/Convertible Top
REMOVING AND INSTALLING/RENEWING DRIVE WITH GEARBOX (FRONT) FOR
ACTUATING SLIDE/TILT SUNROOF
Necessary preliminary tasks
Remove ROOF SWITCH CLUSTER
NOTE: Secure drive with gearbox for actuating sli
Drive, Power Window
NOTES ON INITIALIZING ELECTRIC SEAT ACTUATOR DRIVES
NOTE: Initialization is carried out at the adjusting switch of the
relevant seat.
In this process, the end positions of the relevant electric seat
SEE MORE:
Maintenance and repairs
Advanced technology, for instance the use of
modern materials and high-performance elecelectronics,
requires suitable maintenance and repair
work.
The manufacturer of the vehicle recommends
that you entrust corresponding procedures to a
BMW center. If you choose to use another service
facility, BMW
Symbols and displays
Symbols in the Owner's Manual
Symbol Meaning
Precautions that must be followed
in
order to avoid the possibility of injury
to yourself and to others as well as
serious damage to the vehicle.
Measures that can be taken to help
protect the environment.
Texts in vehicle used to select
individual funct
