BMW 750i 2015-present

BMW 750i 2015-present Electrical Specifications

A detailed guide covering the electrical specifications of the 2015-Present BMW 750i, including battery, alternator, wiring, and circuitry. Essential for maintenance, repair, and upgrades.

Updated Feb 10, 2025

Electrical Specifications Overview Specifications

This document provides a comprehensive overview of the electrical specifications for the 2015-Present BMW 750i. It includes detailed information on electrical systems, components, and technical specifications. Use this guide to understand the electrical architecture, diagnose issues, and perform maintenance or repairs. Navigate through the sections to find specific details, and refer to the quick reference section for key specifications.

How to Use

To search for specific information, use the Ctrl+F function (or Command+F on macOS) to locate keywords within the document. Enter relevant terms such as 'battery', 'alternator', or 'wiring' to find related sections.

Use the table of contents or section headers to navigate through the document. Each major section is divided into subsections for easier access to detailed information. Expand sections to view technical details and specifications.

Key Specifications

▲

Battery Capacity

90 Ah

■

Alternator Output

210A

●

System Voltage

12V

◆

Infotainment Screen Size

12.3 inches

★

Maximum Power Output

1,400 watts

Available Specifications

Battery and Charging System

This section covers the specifications and details of the battery and charging system in the 2015-Present BMW 750i. It includes information on battery type, capacity, and charging system components.

Battery Specifications

Type: Maintenance-free AGM (Absorbent Glass Mat) battery
Capacity: 90 Ah (Ampere-hours)
Voltage: 12V
Cold Cranking Amps (CCA): 800 CCA
Reserve Capacity: 120 minutes
Weight: Approximately 50 lbs (22.68 kg)

Charging System

Alternator Type: High-efficiency alternator with overrunning pulley
Alternator Output: 210A (maximum)
Voltage Regulation: 14.4V ± 0.2V
Belt Driven System: Serpentine belt with automatic tensioner
Charge Indicator: Integrated into the vehicle's dashboard display

Electrical Power Distribution

This section provides details on the electrical power distribution system, including the wiring harness, fuses, and relays.

Wiring Harness

Type: High-durability, multi-core wiring with shielded cables
Material: Cross-linked polyethylene (XLPE) insulation
Weight: Approximately 150 lbs (68 kg)
Connectors: Weather-sealed, gold-plated terminals
CAN Bus: Supports high-speed CAN communication (500 kbps)

Fuse Box and Relays

Location: Primary fuse box in the engine compartment
Secondary fuse boxes: Located in the passenger compartment and trunk
Fuse Types: Blade fuses (ATC/ATO) and mini fuses
Relay Modules: Electronic control modules for power distribution
Fuse Capacity: Up to 80A for high-current circuits

Infotainment and Electronics

This section covers the electrical specifications of the infotainment system, including displays, audio systems, and connectivity features.

Display and Controls

Central Display: 12.3-inch high-resolution LCD touchscreen
Instrument Cluster: 12.3-inch digital instrument display
Resolution: 1920x720 pixels (central display)
Touchscreen Features: Gesture control and voice command integration
Operating System: BMW iDrive 7.0 or later

Audio System

Type: Harman Kardon surround sound system (standard)
Optional: Bowers & Wilkins Diamond surround sound system
Speaker Count: 16 speakers (Bowers & Wilkins system)
Amplifier Power: 1,400 watts (Bowers & Wilkins system)
Audio Formats: Supports MP3, AAC, FLAC, and ALAC

Lighting System

This section provides specifications for the exterior and interior lighting systems, including LED and adaptive lighting features.

Exterior Lighting

Headlights: Adaptive LED headlights with laser technology
Taillights: Full LED taillights with dynamic turn signals
Fog Lights: LED fog lights with cornering function
Daytime Running Lights: LED DRLs integrated into headlights
Lighting Control: Automatic headlight activation and leveling

Interior Lighting

Ambient Lighting: Customizable LED ambient lighting with 12 colors
Door Pockets: LED lighting in door pockets and storage compartments
Footwell Lighting: LED footwell lights with adjustable brightness
Panorama Moonroof: LED lighting integrated into moonroof
Dimming: Automatic dimming for interior lights

Search Specifications

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Component Specifications

Overview

Battery Type: Lithium-Ion

System Voltage: 12V

Electrical Architecture: FlexRay and CAN Bus

Central Electronic Control: Multiple ECUs with integrated control units

Communication Network: Supports Ethernet, CAN, LIN, and FlexRay protocols

Dimensions

Battery Length: 12.0 in (30.5 cm)

Battery Width: 6.8 in (17.3 cm)

Battery Height: 7.5 in (19.1 cm)

Battery Weight: 55.0 lbs (24.9 kg)

Alternator Size: 180 mm (7.1 in) diameter, 160 mm (6.3 in) length

Main Fuse Box Dimensions: 10.0 in x 8.0 in x 4.0 in (25.4 cm x 20.3 cm x 10.2 cm)

Materials

Battery Terminals: Tin-plated copper

Wiring Harness: Copper core with ETFE insulation

Connectors: Nickel-plated brass

Fuses: Silver-plated copper

Circuit Boards: FR4 material with immersion gold plating

Features

Power Management

Energy recuperation system
Start/Stop technology
Regenerative braking
Smart alternator management

Lighting Systems

Adaptive LED headlights with automatic high beams
LED fog lights
Dynamic brake lights
Ambient interior lighting with 16 color options

infotainment And Connectivity

10.25-inch high-resolution display
Harman Kardon surround sound system
BMW iDrive 7.0 operating system
Wireless Apple CarPlay and Android Auto

Convenience Features

Keyless entry with Comfort Access
Remote engine start
Automatic climate control with 4-zone adjustment
Panoramic moonroof with LED dome lights

Safety Systems

Active Driving Assistant
Lane Departure Warning with steering intervention
Automatic Emergency Call (eCall)
360-degree camera system

Safety Features

Collision Avoidance

Forward collision warning
Automatic emergency braking
Pedestrian detection

Electrical System Protection: Overvoltage and undervoltage protection

Monitoring Systems

Battery state-of-charge monitoring
Real-time system diagnostics

Emergency Response: Automatic disconnect of high-voltage battery in crash

Comfort Features

Climate Control: 4-zone automatic climate control

Seating

Heated and ventilated front seats
Heated rear seats
Massage function for front seats

Noise Reduction: Active noise cancellation system

Illumination: Ambient lighting with customizable colors

Accessories

Charging Equipment

AC charging cable (Type 2)
DC Fast Charging capability
BMW Wallbox

interior Accessories

Wireless charging tray
USB ports with 220V outlet

Exterior Accessories

Power rear sunshade
Panoramic moonroof with LED lighting

Maintenance

Service interval: Every 12 months or 15,000 miles

Service Items

Battery performance test
Electrical system diagnostics
Wiring harness inspection
Connector cleaning
Software updates for ECUs

Maintenance Notes

Recommended to use BMW-approved diagnostic tools
High-voltage system requires specialized training to service
Follow proper safety procedures when handling electrical components

Warranty

Battery Warranty: Coverage: 8 years or 100,000 miles
Details: Capacity guarantee of at least 70% after 8 years

Electrical Components Warranty: Coverage: 4 years or 50,000 miles
Details: Covers repairs to electrical system components

Maintenance Warranty: Coverage: 3 years or 36,000 miles
Details: Covers scheduled maintenance services

Accessories Warranty: Coverage: 2 years or unlimited miles
Details: Covers defects in materials and workmanship

Production Details

Manufacturer: Name: BMW Group
Location: Munich, Germany

Manufacturing Process

Robotic welding and assembly
Laser cutting for precision components
Automated testing and quality control
Soldering and PCB assembly

Quality Control: inspection: Multi-stage quality checks
Testing: Functional and performance testing
Certifications: Compliance with ISO 9001 and IATF 16949 standards

Sustainability Practices

Use of recycled materials
Energy-efficient manufacturing processes
End-of-life recycling programs

Production Metrics: Annual Production: Over 100,000 units
Production Cycle: Approximately 20 hours per unit
Quality Rate: 99.9% defect-free rate

Service Information for Electrical System Service

Maintenance and service requirements specific to the electrical system

15,000 miles

12 months

Inspect battery terminals and connections
Update software for all ECUs
Check electrical system for fault codes
Inspect wiring harness and connectors
Test alternator and starter motor performance

Perform diagnostic scan using BMW ISTA/D tool

30,000 miles

24 months

Replace air filter for battery compartment
Clean electrical connectors
Inspect high-voltage cables
Check function of all lighting systems
Test charging system performance

Check for software updates and apply if necessary

60,000 miles

48 months

Replace battery if capacity falls below 80%
Inspect and replace fuses as needed
Perform detailed wiring harness inspection
Test all safety systems
Check condition of electrical components

Major service recommended by BMW guidelines

Frequently Asked Questions

Find answers to common questions about torque specifications

What are the technical specifications of the electrical system in the 2015-Present BMW 750i?

The 2015-Present BMW 750i features a 12V electrical system with an Enhanced Flooded Battery (90Ah, 750 CCA). The alternator capacity is 180A, supporting systems like the 8-speed automatic transmission and adaptive cruise control. Compatibility includes AGM and EFB batteries for optimal performance.

What are the maintenance requirements for the electrical system?

Regular maintenance includes battery checks every 6 months, charging system inspections every 12,000 miles, and spark plug replacements at 60,000 miles. Wiring harnesses should be inspected annually for wear.

How do I replace the battery in my BMW 750i?

1. Ensure the car is turned off. 2. Engage the parking brake. 3. Disconnect the negative terminal. 4. Remove the battery bracket and old battery. 5. Install the new battery and reconnect the terminals. 6. Reset electrical systems via iDrive or a scan tool.

How do I troubleshoot common electrical issues?

Check battery terminals for corrosion and tightness. Test battery voltage (12.4V-12.7V charged). Inspect fuses in the glovebox and trunk. Use BMW ISTA/D for fault codes. Consult a BMW specialist if issues persist.

How can I optimize the electrical system's performance?

Ensure all connections are clean and tight. Avoid excessive accessory loads. Use BMW-approved components. Regularly test the battery and charging system for optimal performance.

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 7 Series (G11/G12) Service Manual

Coming Soon

Comprehensive guide covering electrical system diagnostics, maintenance, and repairs.

Technical Service Bulletin (TSB) - Electrical System Updates

Coming Soon

Details software updates for enhanced electrical system stability and functionality.

BMW Electrical Components Parts Catalog

Coming Soon

Catalog of approved electrical components, including batteries and wiring.

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