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 MANUALSBMW2009550I STANDARD, GS653BZREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTHEADLIGHTSGENERAL ELECTRICAL SYSTEM - SERVICE INFORMATION
2009 BMW 550i Standard, GS653BZ
General Electrical System - Service Information
2009 BMW 550i Standard, GS653BZSECTION General Electrical System - Service Information
- General Electrical System
- Active seat back width adjustment; E60, E61
- Introduction
- Brief description of components
- System functions
- Notes
- Active seat back width adjustment
- Undervoltage and overvoltage
- Easy Entry facility for driver's seat and front-passenger seat
- Centering for setting the seat back width adjustment
- Soft start and soft stop of drive for seat back width adjustment
- Memory for the seat back widths
- Special feature of MDrive in M5
- Operation
- Preconditions for activation
- Bus structures; All models from E38 and MINI
- Car Access System; E60, E61, E63, E64, E70, E81, E87, E90, E91, E92, E93
- Notes
- Introduction
- Brief description of components
- System functions
- Notes
- Terminal control
- Convenient-start system
- Control of the electronic steering lock
- Remote control for central locking system
- Centralized control of the central locking system
- Centralized control of the power windows
- Centralized control for CA (Comfort Access)
- Waking of the MOST via the K CAN for a telematics service
- Centralized data source for the vehicle order and redundant data storage for vehicle data
- Bus diagnosis; All models from E60
- AGM battery; All models from E39
- Electrically operated trailer coupling; E60, E61, E90, E91, E92, E93
- Power supply; E60, E61, E63, E64
- Body-gateway module; E60, E61, E63, E64
- Exterior mirrors; E60, E61, E63, E64
- Power windows; E60, E61, E63, E64
- Central locking system; E60, E61, E63, E64
- Anti-theft alarm system; E60, E61
- Wash/wipe system; E60, E61, E63, E64
- Body electrical/electronic system; E60, E61, E63, E64
- Sliding/tilt sunroof; E60
- iDrive, Central Information Display and Controller; E60, E61, E63, E64, E87, E90, E91, E92
- Comfort Access; E60, E61, E63, E64, E70, E81, E87, E90, E91, E92, E93
- BMW Night Vision; E60, E61, E63, E64, E65, E66
- Park Distance Control; E60, E61, E63, E64
- Active seat back width adjustment; E60, E61
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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.