BMW 745i 2020-present

BMW 745i 2020-present Electrical Specifications

Detailed technical specifications for the 2020-Present BMW 745i electrical system, including wiring diagrams, voltage requirements, and advanced system details. Essential for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the electrical specifications for the 2020-Present BMW 745I, 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 with a title and includes subsections for detailed information.

Key Specifications

Battery Voltage

12.6V - 14.7V

Alternator Output

210 A at 14.7V

Headlight Power

35W per side

Infotainment Display

12.3-inch, 1920x720

Wireless Charging

15W output

Available Specifications

Battery and Charging System

Details about the battery specifications, charging system, and related components

Battery Specifications

12V AGM (Absorbent Glass Mat) battery
Capacity: 92 Ah
Cold Cranking Amps (CCA): 850 A
Battery voltage range: 12.6V - 14.7V
Battery management system (BMS) integrated

Alternator Specifications

Output: 210 A at 14.7V
Efficiency: 85% at full load
Integrated voltage regulator
Operating temperature range: -40°C to 120°C

Note: The alternator is designed to work with the BMS for optimal charging performance.

Electrical Distribution System

Information about the fuse box, relays, and electrical distribution components

Fuse Box Layout

Main fuse box located in the engine compartment
Secondary fuse box in the trunk
Fuse ratings range from 5A to 40A
Color-coded fuses for easy identification

Relay Specifications

Standard 12V relays
Relay current rating: 30A max
Relay coil resistance: 80 ohms
Relay operating temperature: -40°C to 85°C

Lighting System

Technical details about the exterior and interior lighting systems

Exterior Lighting

LED headlights with adaptive functionality
Headlight power consumption: 35W per side
Daytime Running Lights (DRL) power: 10W
LED taillights with dynamic turn signals

Interior Lighting

Ambient lighting with 11 color options
LED dome light power: 5W
Reading lights: 2W per side
Footwell lighting: 3W per side

Infotainment and Connectivity

Details about the infotainment system, displays, and connectivity features

Infotainment System

12.3-inch touchscreen display
Resolution: 1920x720 pixels
Processor: 2.5 GHz quad-core
RAM: 8GB, Storage: 128GB

Connectivity Features

Wi-Fi hotspot with 4G LTE support
Bluetooth 5.0 with A2DP support
USB-C ports with 15W charging capability
Wireless charging pad: 15W output

Note: The infotainment system supports over-the-air (OTA) updates.

Search Specifications

Search by specification name, value, or description

Component Specifications

Battery

Type: AGM (Absorbent Glass Mat)

Voltage: 12V

Capacity: 105Ah

Cold Cranking Amps: 850A

Part Number: 61217650000

Maintenance: Maintenance-free

Replacement interval: 5 years or 60,000 miles

Alternator

Type: BOSCH

Output: 210A

Voltage: 12V

Part Number: 12317650000

Efficiency: 85%

Operating Temperature Range: -40°C to 120°C

Starter Motor

Type: Permanent Magnet

Power: 2.2kW

Voltage: 12V

Part Number: 12417650000

Operating Temperature Range: -40°C to 120°C

Cranking Speed: 200-300 rpm

Fuse Box

Location: Under the glove compartment

Fuse Types

Mini
Micro2
Micro3

Fuse Ratings

5A
7.5A
10A
15A
20A
25A
30A

Part Number: 61317650000

Maintenance: Check every 12 months or 15,000 miles

Wiring Harness

Material: Copper with PVC insulation

Wire Gauge Range: 0.5mm² to 6.0mm²

Part Number: 61127650000

Operating Temperature Range: -40°C to 120°C

Maintenance: Inspect for wear and tear every 30,000 miles

Lighting System

Headlights: Type: LED
Power: 35W
Lumen Output: 3200 lm
Part Number: 63117650000

Taillights: Type: LED
Power: 10W
Lumen Output: 500 lm
Part Number: 63217650000

Fog Lights: Type: Halogen
Power: 55W
Lumen Output: 1200 lm
Part Number: 63317650000

Sensors

Battery Sensor: Type: Intelligent Battery Sensor (IBS)
Part Number: 61417650000
Operating Voltage: 12V
Temperature Range: -40°C to 120°C

Rain Sensor: Type: Optical
Part Number: 61517650000
Sensitivity: Adjustable
Operating Temperature Range: -20°C to 80°C

Parking Sensors: Type: Ultrasonic
Part Number: 61617650000
Range: 0.3m to 2.5m
Operating Temperature Range: -40°C to 85°C

Control Modules

Body Domain Controller: Part Number: 61717650000
Operating Voltage: 12V
Temperature Range: -40°C to 85°C
Functions: Lighting control, Window control, Central locking

Engine Control Unit: Part Number: 61817650000
Operating Voltage: 12V
Temperature Range: -40°C to 120°C
Functions: Fuel injection control, Ignition timing, Emission control

Charging System

Wireless Charging Pad: Type: Qi Standard
Power Output: 15W
Part Number: 61917650000
Compatibility: Qi-enabled devices
Operating Temperature Range: 0°C to 40°C

Usb Ports: Type: USB-C
Power Output: 5V/3A
Part Number: 62017650000
Compatibility: USB-C devices
Operating Temperature Range: 0°C to 40°C

Diagnostics

Obd Port: Type: OBD-II
Location: Under the dashboard
Protocols: CAN, ISO 15765-4
Part Number: 62117650000

Diagnostic Tools

BMW ISTA
BMW INPA

Error Codes

P0001
P0100
P0200
P0300
P0400

Diagnostic interval: Every 12 months or 15,000 miles

Service Information Service

Detailed service requirements and schedules

15,000

Battery health check
Alternator output test
Fuse box inspection
Wiring harness inspection
Lighting system check
Sensor calibration
Control module software update

Ensure all electrical connections are secure and free of corrosion

30,000

Battery replacement if necessary
Alternator belt inspection
Fuse replacement if necessary
Wiring harness replacement if necessary
Lighting system bulb replacement
Sensor replacement if necessary
Control module replacement if necessary

Replace any components showing signs of wear or failure

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the voltage of the 2020-Present BMW 745i's electrical system?

The 2020-Present BMW 745i operates on a 12-volt electrical system. The battery is a 12V AGM (Absorbent Glass Mat) type, with a capacity of 90Ah and a cold cranking amperage (CCA) of 850A.

What type of alternator is used in the 2020-Present BMW 745i?

The vehicle is equipped with a high-efficiency Bosch alternator, rated at 180A. It features smart charging technology to optimize power output and reduce fuel consumption.

How do I reset the battery registration after replacement?

After replacing the battery, you must register it using the BMW ISTA diagnostic system or a compatible OBD-II tool. This ensures the vehicle's power management system recognizes the new battery and adjusts charging parameters accordingly.

What is the maximum power output of the 12V power outlets?

The 12V power outlets in the 2020-Present BMW 745i have a maximum output of 120W (10A). Avoid exceeding this limit to prevent circuit overload or damage to connected devices.

How do I troubleshoot a malfunctioning iDrive system?

If the iDrive system malfunctions, first check for software updates via the BMW ConnectedDrive portal. If the issue persists, perform a system reset by holding the volume knob for 30 seconds. For persistent issues, consult a BMW-certified technician.

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 745i Electrical System Overview

Coming Soon

Detailed guide covering the electrical system architecture, components, and specifications for the 2020-Present BMW 745i.

Battery Replacement and Registration Guide

Coming Soon

Step-by-step instructions for replacing and registering the 12V AGM battery in the BMW 745i, including diagnostic tool requirements.

iDrive System Troubleshooting Manual

Coming Soon

Comprehensive troubleshooting guide for resolving common iDrive system issues, including software updates and reset procedures.

Alternator and Charging System Diagnostics

Coming Soon

Technical manual for diagnosing and repairing alternator and charging system issues in the BMW 745i.

About the Author

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