Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2021740I XDRIVEREPAIR AND DIAGNOSISBODY & FRAMEWINDOWSELECTRICAL DRIVES -- REPAIR (G12)
2021 BMW 740i xDrive
Electrical Drives -- Repair (G12)
2021 BMW 740i xDriveSECTION Electrical Drives -- Repair (G12)
- 67 10 Electrical Drive Units/Systems
- 67 11 Central Locking Unit/Releasing Motor
- 67 13 Drive for mirror adjustment
- 67 31 Drive, Seat Adjustment
- Notes on initialization of electric seat actuator drives
- 67 31 500 Removing and installing/replacing forward/back seat adjustment drive unit (left or right) (after vehicle diagnosis)
- 67 31 510 Removing and installing/replacing drive unit for seat cushion tilt adjustment (after vehicle diagnosis)
- 67 31 520 Removing and installing/replacing the drivetrain for the seat height adjustment (after vehicle diagnosis)
- 67 31 530 Removing and installing/replacing backrest adjustment motor
- 67 31 540 Removing and installing/replacing drive for backrest upper section adjustment (Comfort seat) (left or right) (after vehicle diagnosis)
- 67 31 545 Removing and installing/replacing drive for backrest width adjustment (inner) (after vehicle diagnosis)
- 67 31 550 Removing and installing/replacing drive for backrest width adjustment (outer) (after vehicle diagnosis)
- 67 31 560 Removing and installing or replacing drive unit of thigh support (after vehicle diagnosis)
- 67 31 570 Removing and installing/replacing the drive for the headrest height adjustment at the front seat on the left or right (left or right) (after vehicle diagnosis)
- 67 31 572 Removing and installing/replacing the drive for the headrest height adjustment at the front seat on the left or right (Comfort seat) (left or right) (after vehicle diagnosis)
- 67 31 590 Removing and installing/replacing drive for head restraint folding adjustment (left or right) (after vehicle diagnosis)
- 67 31 600 Removing and installing/replacing drive for seat length/tilt adjustment (comfort seat in rear passenger compartment) (left or right) (following vehicle diagnosis)
- 67 31 610 Removing and installing/replacing drive unit for seat cushion tilt adjustment (comfort seat in rear passenger compartment) (left or right) (following vehicle diagnosis)
- 67 31 630 Removing and installing/replacing backrest adjustment motor (comfort seat in rear passenger compartment) (left or right) (following vehicle diagnosis)
- 67 31 640 Removing and installing/replacing drive for backrest upper section adjustment (comfort seat in rear passenger compartment) (left or right) (following vehicle diagnosis)
- Removing the drive for the backrest upper section adjustment in the rear passenger compartment
- When replacing the backrest upper section adjustment drive in the rear passenger compartment: Remount gearing for backrest upper section adjustment
- Installing the backrest upper section adjustment drive in the rear passenger compartment
- 67 31 702 Removing and installing/replacing drive for headrest height adjustment of rear seat backrest (comfort seat in rear passenger compartment) (left or right) (following vehicle diagnosis)
- 67 32 Fan (Seats)
- 67 61 Drive, Sliding/Tilting Sunroof, Convertible Top
- 67 62 Power Window Drive
- 67 65 Drive, Roller SUNBLIND/Sun Visor
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.