BMW 740i 2016-present Electrical Specifications
Detailed technical specifications for the electrical system of the 2016-Present BMW 740i, including wiring diagrams, voltage requirements, and component-specific data.
Overview Specifications
Comprehensive description of the electrical specifications for the 2016-Present BMW 740i, 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', 'alternator output', or 'fuse ratings'.
Navigate through the electrical documentation sections using the table of contents or by scrolling through the document. Each major section is labeled for easy reference.
Key Specifications
Battery Voltage
12.6V - 14.8V
Alternator Output
180 A at 13.5V
Headlight Output
1,200 lumens (high beam)
Wireless Charging
15W output
Infotainment Display
10.25-inch, 1920 x 720 pixels
Available Specifications
Battery and Charging System
This section covers the battery specifications, charging system components, and related electrical measurements.
Battery and Charging System
This section covers the battery specifications, charging system components, and related electrical measurements.
Battery Specifications
- 12V AGM (Absorbent Glass Mat) battery
- Capacity: 90 Ah
- Cold Cranking Amps (CCA): 850 A
- Battery voltage range: 12.6V - 14.8V
- Battery management system (BMS) integrated
Alternator Specifications
- Output: 180 A at 13.5V
- Efficiency: 85% at full load
- Regulated voltage: 13.5V - 14.8V
- Integrated voltage regulator
- Belt-driven with automatic tensioner
Note: The alternator output may vary based on engine RPM and electrical load.
Fuse and Relay System
This section provides details on the fuse and relay system, including locations, ratings, and functions.
Fuse and Relay System
This section provides details on the fuse and relay system, including locations, ratings, and functions.
Fuse Box Locations
- Primary fuse box located in the glove compartment
- Secondary fuse box in the trunk near the battery
- Engine compartment fuse box for high-current circuits
- Fuse ratings range from 5A to 80A
Relay Functions
- Main power relay: 30A rating
- Fuel pump relay: 20A rating
- Headlight relay: 15A rating
- A/C compressor relay: 25A rating
Note: Relay locations are labeled on the fuse box cover for easy identification.
Lighting System
This section details the lighting system, including headlights, taillights, and interior lighting specifications.
Lighting System
This section details the lighting system, including headlights, taillights, and interior lighting specifications.
Exterior Lighting
- LED headlights with adaptive cornering function
- High beam output: 1,200 lumens
- Low beam output: 900 lumens
- LED taillights with dynamic turn signals
Interior Lighting
- Ambient lighting with 11 color options
- LED dome lights with dimming function
- Reading lights: 50 lumens each
- Trunk light: 200 lumens
Note: Ambient lighting brightness is adjustable via iDrive system.
Infotainment and Connectivity
This section covers the infotainment system, connectivity features, and electrical specifications.
Infotainment and Connectivity
This section covers the infotainment system, connectivity features, and electrical specifications.
Infotainment System
- 10.25-inch touchscreen display
- Resolution: 1920 x 720 pixels
- iDrive 6.0 operating system
- Harman Kardon surround sound system
Connectivity Features
- Bluetooth 4.2 with A2DP support
- Wi-Fi hotspot with 4G LTE connectivity
- USB-C ports with 3.1A charging capability
- Wireless charging pad: 15W output
Note: Wireless charging pad supports Qi-compatible devices.
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Component Specifications
Battery
- Type
- AGM (Absorbent Glass Mat)
- Voltage
- 12V
- Capacity
- 90Ah
- Cold Cranking Amps
- 850A
- Part Number
- 61219107900
- 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
- 12317848468
- Operational Temperature Range
- -40°C to 120°C
- Efficiency
- 85%
- Replacement interval
- 100,000 miles
- Diagnostic Codes
-
- P0620
- P0621
- P0622
Starter Motor
- Type
- BOSCH
- Power
- 1.4kW
- Voltage
- 12V
- Part Number
- 12417700000
- Operational Temperature Range
- -40°C to 120°C
- Replacement interval
- 150,000 miles
- Diagnostic Codes
-
- P0335
- P0336
- P0337
Fuse Box
- Location
- Passenger compartment and engine bay
- Fuse Types
-
- Mini
- Micro2
- Micro3
- Main Fuse Rating
- 150A
- Part Number
- 61139265400
- 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
- 0.5mm² to 6.0mm²
- Part Number
- 61129265400
- Operational Temperature Range
- -40°C to 120°C
- Maintenance
- Inspect for wear or damage every 30,000 miles
- Safety Notes
- Avoid sharp bends and ensure proper routing
Lighting System
- Headlights
- Type: LEDPower: 35WLumen Output: 3200lmPart Number: 63117365400Replacement interval: 50,000 miles
- Taillights
- Type: LEDPower: 10WLumen Output: 500lmPart Number: 63217365400Replacement interval: 50,000 miles
- Fog Lights
- Type: HalogenPower: 55WLumen Output: 1200lmPart Number: 63317365400Replacement interval: 30,000 miles
Sensors
- Oxygen Sensor
- Type: WidebandPart Number: 11787565400Operational Temperature Range: -40°C to 800°CReplacement interval: 100,000 milesDiagnostic Codes: P0130, P0131, P0132
- Crankshaft Position Sensor
- Type: MagneticPart Number: 12147565400Operational Temperature Range: -40°C to 150°CReplacement interval: 100,000 milesDiagnostic Codes: P0335, P0336, P0337
- Camshaft Position Sensor
- Type: Hall EffectPart Number: 12147565401Operational Temperature Range: -40°C to 150°CReplacement interval: 100,000 milesDiagnostic Codes: P0340, P0341, P0342
Control Modules
- Engine Control Module
- Type: Bosch MEVD17.2Part Number: 12347565400Operational Temperature Range: -40°C to 85°CReplacement interval: Lifetime (unless faulty)Diagnostic Codes: P0600, P0601, P0602
- Body Control Module
- Type: BoschPart Number: 61347565400Operational Temperature Range: -40°C to 85°CReplacement interval: Lifetime (unless faulty)Diagnostic Codes: B1000, B1001, B1002
- Transmission Control Module
- Type: ZFPart Number: 75847565400Operational Temperature Range: -40°C to 85°CReplacement interval: Lifetime (unless faulty)Diagnostic Codes: P0700, P0701, P0702
Charging System
- Wireless Charging Pad
- Type: Qi StandardPower Output: 15WPart Number: 84107565400Operational Temperature Range: 0°C to 40°CCompatibility: Qi-enabled devicesSafety Notes: Remove metal objects before charging
- Usb Ports
- Type: USB-CPower Output: 5V/3APart Number: 84117565400Operational Temperature Range: 0°C to 40°CCompatibility: USB-C devicesSafety Notes: Avoid liquid exposure
Diagnostic interface
- Type
- OBD-II
- Protocol
- ISO 15765-4 (CAN)
- Location
- Driver's side dashboard
- Part Number
- 61127565400
- Diagnostic Codes
-
- P0001 to P2999
- B0001 to B2999
- C0001 to C2999
- Safety Notes
- Ensure vehicle is stationary during diagnostics
Service Information Service
Detailed service requirements and schedules for the electrical system
- Inspect battery terminals for corrosion
- Check alternator output voltage
- Inspect wiring harness for wear or damage
- Test all lighting components
Ensure all electrical connections are secure
- Replace battery if necessary
- Inspect and clean all sensors
- Check control module connections
- Test diagnostic interface functionality
Use OEM parts for replacements
- Replace alternator if necessary
- Replace starter motor if necessary
- Inspect and replace fuses as needed
- Perform full electrical system diagnostic
Consult BMW service manual for detailed procedures
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the voltage of the battery in the 2016-Present BMW 740i?
What is the voltage of the battery in the 2016-Present BMW 740i?
The 2016-Present BMW 740i is equipped with a 12-volt lithium-ion battery. The battery has a nominal voltage of 12V and a capacity of approximately 90 Ah, depending on the specific model and configuration.
Q2 What type of alternator is used in the BMW 740i, and what is its output?
What type of alternator is used in the BMW 740i, and what is its output?
The BMW 740i uses a high-efficiency Bosch or Valeo alternator with an output of 180-220 amps, depending on the model year and optional equipment. The alternator is designed to support the vehicle's advanced electrical systems, including the iDrive infotainment system and advanced driver-assistance systems (ADAS).
Q3 How do I reset the battery registration after replacement?
How do I reset the battery registration after replacement?
After replacing the battery in the BMW 740i, you must register the new battery using the BMW diagnostic tool (ISTA/D or compatible software). This ensures the vehicle's power management system (IBS) recognizes the new battery and adjusts charging parameters accordingly. Failure to register the battery can lead to improper charging and reduced battery life.
Q4 What is the maximum load capacity of the electrical system?
What is the maximum load capacity of the electrical system?
The electrical system of the BMW 740i is designed to handle a maximum load of approximately 2,500 watts. This includes power for the engine control unit, lighting, infotainment, climate control, and other auxiliary systems. Exceeding this load may cause electrical faults or system failures.
Q5 Can I install aftermarket electrical components without voiding the warranty?
Can I install aftermarket electrical components without voiding the warranty?
Installing aftermarket electrical components may void your BMW warranty if the installation causes damage or malfunctions in the vehicle's electrical system. Always consult your BMW dealership or authorized service center before making modifications to ensure compliance with warranty terms.
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 740i Electrical System Overview
Coming SoonDetailed guide covering the electrical architecture, components, and specifications for the 2016-Present BMW 740i.
Battery Replacement and Registration Guide
Coming SoonStep-by-step instructions for replacing and registering the battery in the BMW 740i, including required tools and diagnostic procedures.
Alternator Testing and Troubleshooting
Coming SoonComprehensive resource for diagnosing and troubleshooting alternator issues in the BMW 740i, including voltage and amperage testing procedures.
Electrical Load Management System (IBS)
Coming SoonTechnical documentation on the Intelligent Battery Sensor (IBS) and its role in managing the electrical load and charging system in the BMW 740i.
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