BMW 640i 2011-2018 Electrical Specifications
Detailed technical specifications and documentation for the electrical system of the 2011-2018 BMW 640i. Includes wiring diagrams, fuse layouts, control module details, and diagnostic procedures.
Overview Specifications
Comprehensive description of the electrical specifications for the 2011-2018 BMW 640I, including key features, measurements, and technical details.
How to Use
Use the search function to locate specific electrical specifications by entering keywords such as 'battery voltage', 'fuse ratings', or 'wiring diagrams'.
Navigate through the electrical documentation sections using the table of contents or by scrolling through the document. Each major section is labeled clearly for easy access.
Key Specifications
Battery Voltage
12V
Alternator Output
180A
Headlight Power
35W
Fuse Rating
150A (Main)
Wire Gauge Range
0.5mm² to 16mm²
Available Specifications
Battery and Charging System
Details about the battery specifications, charging system components, and related electrical measurements.
Battery and Charging System
Details about the battery specifications, charging system components, and related electrical measurements.
Battery Specifications
- Battery type: AGM (Absorbent Glass Mat)
- Battery voltage: 12V
- Battery capacity: 90Ah
- Cold cranking amps (CCA): 850A
Charging System
- Alternator output: 180A
- Charging voltage range: 13.5V - 14.8V
- Voltage regulator type: Integrated
- Battery monitoring system: IBS (Intelligent Battery Sensor)
Note: Ensure the alternator belt tension is within 500-600 N for optimal performance.
Fuse and Relay System
Information about fuse ratings, relay locations, and circuit protection mechanisms.
Fuse and Relay System
Information about fuse ratings, relay locations, and circuit protection mechanisms.
Fuse Ratings
- Main fuse rating: 150A
- Standard fuse ratings: 5A, 7.5A, 10A, 15A, 20A, 25A, 30A
- Fuse box locations: Engine compartment, glove compartment, trunk
- Fuse material: Blade-type
Relay System
- Relay types: Mini ISO, Micro ISO
- Relay locations: Junction box in engine compartment
- Relay control: Integrated into FRM (Footwell Module)
- Relay switching capacity: 30A
Note: Always disconnect the battery before replacing fuses or relays.
Lighting System
Technical details about the vehicle's lighting system, including headlights, taillights, and interior lighting.
Lighting System
Technical details about the vehicle's lighting system, including headlights, taillights, and interior lighting.
Exterior Lighting
- Headlight type: Bi-Xenon with adaptive LED
- Headlight power: 35W per bulb
- Taillight type: LED
- Fog light power: 55W
Interior Lighting
- Dome light type: LED
- Dome light power: 5W
- Ambient lighting: RGB LED with adjustable brightness
- Reading light power: 3W
Note: LED lights are not serviceable and require module replacement if faulty.
Wiring and Connectors
Details about the wiring harness, connectors, and electrical routing.
Wiring and Connectors
Details about the wiring harness, connectors, and electrical routing.
Wiring Harness
- Wire gauge range: 0.5mm² to 16mm²
- Harness material: Copper with PVC insulation
- Harness routing: Engine compartment, underbody, interior
- Harness protection: Conduit and loom
Connectors
- Connector types: AMP, Deutsch, Molex
- Pin count: 2 to 48 pins
- Sealing: IP67 rated for water resistance
- Terminal material: Tin-plated copper
Note: Use a proper terminal removal tool to avoid damaging connectors.
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Component Specifications
Battery
- Type
- AGM (Absorbent Glass Mat)
- Voltage
- 12V
- Capacity
- 90Ah
- Cold Cranking Amps
- 850A
- Part Number
- 61217604810
- Maintenance
- Maintenance-free
- Replacement interval
- 5 years or 60,000 miles
- Safety Notes
- Ensure ignition is off before disconnecting to avoid electrical system damage
Alternator
- Type
- Bosch
- Output
- 180A
- Voltage
- 14V
- Part Number
- 12317838796
- Operating Temperature Range
- -40°C to 120°C
- Efficiency
- 85%
- Replacement interval
- 100,000 miles
- Cross Reference
- Battery, voltage regulator
Starter Motor
- Type
- Bosch
- Power Rating
- 1.4kW
- Voltage
- 12V
- Part Number
- 12417707235
- Operating Temperature Range
- -40°C to 100°C
- Replacement interval
- 150,000 miles
- Diagnostic Specifications
- Check for voltage drop during cranking, should not exceed 0.5V
Ignition System
- Spark Plug Type
- Bosch ZR5TPP33
- Spark Plug Gap
- 0.032 inches
- Ignition Coil Type
- Bosch
- Ignition Coil Resistance
- 0.5-0.7 ohms
- Part Number
- 12137548073
- Replacement interval
- 60,000 miles
- Diagnostic Specifications
- Check for misfires using BMW diagnostic software
Lighting System
- Headlight Type
- Xenon
- Headlight Power
- 35W
- Headlight Part Number
- 63117284871
- Taillight Type
- LED
- Taillight Part Number
- 63217284872
- Fog Light Type
- Halogen
- Fog Light Power
- 55W
- Fog Light Part Number
- 63117284873
- Replacement interval
- As needed
- Diagnostic Specifications
- Check for burnt-out bulbs and wiring integrity
Fuse Box
- Location
- Passenger side dashboard
- Fuse Type
- Mini blade
- Fuse Ratings
-
- 5A
- 7.5A
- 10A
- 15A
- 20A
- 25A
- 30A
- Part Number
- 61317838797
- Maintenance
- Inspect fuses every 30,000 miles
- Safety Notes
- Always replace with the same amperage rating
Wiring Harness
- Material
- Copper with PVC insulation
- Wire Gauge Range
- 18-12 AWG
- Operating Temperature Range
- -40°C to 105°C
- Part Number
- 61117838798
- Maintenance
- Inspect for wear and corrosion every 30,000 miles
- Diagnostic Specifications
- Check for continuity and resistance using a multimeter
Sensors
- Oxygen Sensor Type
- Planar
- Oxygen Sensor Part Number
- 11787548074
- Crankshaft Position Sensor Type
- Hall Effect
- Crankshaft Position Sensor Part Number
- 12147548075
- Camshaft Position Sensor Type
- Hall Effect
- Camshaft Position Sensor Part Number
- 12147548076
- Replacement interval
- 100,000 miles
- Diagnostic Specifications
- Check for proper voltage and signal output using BMW diagnostic software
Control Modules
- Engine Control Module Type
- Bosch MEVD17.2
- Engine Control Module Part Number
- 12347548077
- Transmission Control Module Type
- ZF
- Transmission Control Module Part Number
- 12347548078
- Body Control Module Type
- Bosch
- Body Control Module Part Number
- 12347548079
- Replacement interval
- As needed
- Diagnostic Specifications
- Check for fault codes using BMW diagnostic software
Charging System
- Alternator Output
- 180A
- Battery Charging Voltage
- 13.8-14.4V
- Charging System Efficiency
- 85%
- Part Number
- 12317838796
- Maintenance
- Inspect belt tension and condition every 30,000 miles
- Diagnostic Specifications
- Check for proper voltage output and charging system performance
Service Information Service
Detailed service requirements and schedules for the electrical system
- Inspect battery terminals and connections
- Check alternator belt tension and condition
- Inspect wiring harness for wear and corrosion
Ensure all connections are clean and secure
- Replace spark plugs
- Inspect and test ignition coils
- Check and replace fuses as needed
Use only BMW-approved parts for replacements
- Replace oxygen sensors
- Inspect and test all control modules
- Check and replace starter motor if necessary
Perform a full diagnostic scan using BMW software
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the voltage rating for the 2011-2018 BMW 640i electrical system?
What is the voltage rating for the 2011-2018 BMW 640i electrical system?
The 2011-2018 BMW 640i operates on a 12-volt electrical system. The battery voltage typically ranges between 12.6V (fully charged) and 14.4V (charging voltage when the engine is running).
Q2 What is the amperage rating for the alternator in the 2011-2018 BMW 640i?
What is the amperage rating for the alternator in the 2011-2018 BMW 640i?
The alternator in the 2011-2018 BMW 640i has a rated output of 180 amps. This ensures sufficient power for the vehicle's electrical systems, including advanced features like the iDrive system and adaptive headlights.
Q3 How do I reset the battery registration after replacement?
How do I reset the battery registration after replacement?
After replacing the battery, you must register it using a BMW-specific diagnostic tool such as ISTA or a compatible OBD-II scanner with BMW software. This ensures the vehicle's power management system recognizes the new battery and adjusts charging parameters accordingly.
Q4 What is the fuse rating for the headlight circuit in the 2011-2018 BMW 640i?
What is the fuse rating for the headlight circuit in the 2011-2018 BMW 640i?
The headlight circuit in the 2011-2018 BMW 640i is protected by a 20-amp fuse. Always replace fuses with the same rating to avoid electrical system damage.
Q5 Can I use aftermarket LED bulbs in the 2011-2018 BMW 640i?
Can I use aftermarket LED bulbs in the 2011-2018 BMW 640i?
While aftermarket LED bulbs can be installed, they may trigger error codes or cause malfunctions in the vehicle's lighting system. BMW recommends using genuine parts to ensure compatibility and avoid warranty issues.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
BMW 640i Electrical System Overview
Coming SoonA detailed guide to the electrical system architecture, including wiring diagrams and component locations.
Battery Replacement and Registration Guide
Coming SoonStep-by-step instructions for replacing the battery and registering it with the vehicle's power management system.
Fuse Box Layout and Specifications
Coming SoonA comprehensive diagram and description of the fuse box layout, including fuse ratings and their corresponding circuits.
Alternator Testing and Replacement
Coming SoonTechnical instructions for testing the alternator's output and replacing it if necessary.
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