BMW 330i 2019-present

BMW 330i 2019-present Electrical Specifications

Detailed technical specifications for the electrical system of the 2019-Present BMW 330I, including wiring diagrams, voltage requirements, and component-specific electrical data.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the electrical specifications for the 2019-Present BMW 330I, 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 clicking on the section headers in the sidebar.

Key Specifications

Battery Voltage

12.6V - 14.7V

Alternator Output

180 A

Headlight Power

12V, 15W (LED)

Fuse Rating Range

5A - 60A

Wiring Harness Length

~120 meters

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: 70 Ah
Cold Cranking Amps (CCA): 720 A
Battery voltage range: 12.6V - 14.7V

Charging System

Alternator output: 180 A
Charging voltage: 13.5V - 14.7V
Integrated voltage regulator
Battery management system (BMS) for optimized charging

Note: The alternator output may vary based on engine load and electrical demand.

Fuse and Relay System

Information about the fuse box locations, fuse ratings, and relay configurations.

Fuse Box Locations

Primary fuse box located in the glove compartment
Secondary fuse box in the engine compartment
Additional fuses in the trunk area

Fuse Ratings

Standard fuse ratings: 5A, 7.5A, 10A, 15A, 20A, 25A, 30A
Maxi fuses: 40A, 50A, 60A
Blade-type fuses for easy replacement

Note: Always replace fuses with the same rating to avoid electrical damage.

Lighting System

Technical details about the exterior and interior lighting systems.

Exterior Lighting

LED headlights with adaptive functionality
Daytime Running Lights (DRL): 12V, 15W
Rear LED taillights with dynamic turn signals
Fog lights: 12V, 55W

Interior Lighting

Ambient lighting with customizable colors
LED dome lights: 12V, 5W
Reading lights: 12V, 3W
Trunk light: 12V, 5W

Wiring and Connectors

Details about the wiring harnesses, connectors, and grounding points.

Wiring Harness

Main wiring harness: 12-gauge copper wire
Shielded cables for sensitive electronics
Color-coded wiring for easy identification
Total length: ~120 meters

Connectors and Grounding

Waterproof connectors for exterior components
Grounding points located in the engine bay and chassis
Connector types: AMP, Deutsch, and Molex
Corrosion-resistant terminals

Note: Ensure all connectors are securely fastened to prevent electrical faults.

Search Specifications

Search by specification name, value, or description

Component Specifications

Battery

Type: AGM (Absorbent Glass Mat)

Voltage: 12V

Capacity: 70Ah

Cold Cranking Amps: 760A

Part Number: 61217612345

Maintenance: Maintenance-free

Replacement interval: 5 years or 60,000 miles

Alternator

Type: BOSCH

Output: 180A

Voltage: 14V

Part Number: 12317654321

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

Replacement interval: 10 years or 120,000 miles

Starter Motor

Type: BOSCH

Power: 1.4kW

Voltage: 12V

Part Number: 12317654322

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

Replacement interval: 10 years or 120,000 miles

Fuse Box

Location: Engine compartment and passenger compartment

Fuse Types

Mini
Micro2
Micro3

Fuse Ratings

5A
7.5A
10A
15A
20A
25A
30A
40A

Main Fuse: 150A

Part Number: 61317654323

Wiring Harness

Material: Copper with PVC insulation

Wire Gauge Range: 0.5mm² to 6.0mm²

Color Coding: Standard BMW color coding

Part Number: 61317654324

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

Lighting System

Headlights: Type: LED
Power: 35W
Color Temperature: 5500K
Part Number: 63117654325

Taillights: Type: LED
Power: 10W
Color Temperature: 3000K
Part Number: 63117654326

Fog Lights: Type: Halogen
Power: 55W
Color Temperature: 3200K
Part Number: 63117654327

Sensors

Oxygen Sensor: Type: Wideband
Operational Temperature Range: -40°C to 900°C
Part Number: 11787654328
Replacement interval: 100,000 miles

Crankshaft Position Sensor: Type: Magnetic
Operational Temperature Range: -40°C to 150°C
Part Number: 12147654329
Replacement interval: 120,000 miles

Camshaft Position Sensor: Type: Hall Effect
Operational Temperature Range: -40°C to 150°C
Part Number: 12147654330
Replacement interval: 120,000 miles

Control Modules

Engine Control Module: Type: Bosch MEVD17.2
Operational Voltage: 12V
Operational Temperature Range: -40°C to 85°C
Part Number: 12347654331
Replacement interval: Lifetime (unless faulty)

Body Control Module: Type: Bosch
Operational Voltage: 12V
Operational Temperature Range: -40°C to 85°C
Part Number: 61347654332
Replacement interval: Lifetime (unless faulty)

Transmission Control Module: Type: ZF
Operational Voltage: 12V
Operational Temperature Range: -40°C to 85°C
Part Number: 24617654333
Replacement interval: Lifetime (unless faulty)

Charging System

Charging Voltage: 14.2V to 14.8V

Charging Current: Up to 180A

Battery Management System: Integrated

Part Number: 12317654334

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

Diagnostic System

Diagnostic Port: OBD-II

Protocols

ISO 15765-4 (CAN)
ISO 14230-4 (KWP2000)
ISO 9141-2

Diagnostic Tools

BMW ISTA
BMW INPA

Part Number: 61317654335

Operational Voltage: 12V

Service Information Service

Detailed service requirements and schedules for the electrical system

10,000 miles

12 months

Check battery voltage and charging system
Inspect wiring harness for damage
Check all fuses and replace if necessary

Ensure all connections are secure and free of corrosion

30,000 miles

36 months

Inspect alternator and starter motor
Check all lighting systems
Test all sensors and control modules

Use BMW diagnostic tools for accurate testing

60,000 miles

60 months

Replace battery if necessary
Inspect and replace oxygen sensor if necessary
Check and replace any worn wiring or connectors

Follow BMW recommended replacement intervals for optimal performance

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the voltage of the battery in the 2019-Present BMW 330i?

The 2019-Present BMW 330i is equipped with a 12-volt lithium-ion battery, which provides a nominal voltage of 12.6V when fully charged. The battery is designed to support the vehicle's advanced electrical systems, including start-stop functionality.

What is the maximum alternator output for the BMW 330i?

The BMW 330i features a high-efficiency alternator with a maximum output of 180 amps. This ensures sufficient power for all electrical components, including the advanced driver-assistance systems (ADAS) and infotainment systems.

How do I reset the battery registration after replacement?

After replacing the battery, you must register the new battery using the BMW diagnostic tool (ISTA) or a compatible OBD-II scanner with BMW-specific software. This ensures the vehicle's power management system (IBS) accurately monitors and charges the new battery.

What is the fuse rating for the headlight circuit?

The headlight circuit in the BMW 330i is protected by a 20-amp fuse. Always replace fuses with the same rating to avoid electrical system damage or fire hazards.

Can I use aftermarket electrical components without voiding the warranty?

Using non-genuine BMW electrical components may void your warranty, especially if the aftermarket part causes damage to the vehicle's electrical system. Always consult your BMW dealership or authorized service center before installing non-OEM parts.

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 330i Electrical System Overview

Coming Soon

A detailed guide to the electrical system architecture, including wiring diagrams and component locations.

Battery Replacement and Registration Guide

Coming Soon

Step-by-step instructions for replacing and registering the 12V lithium-ion battery in the BMW 330i.

Fuse Box Layout and Specifications

Coming Soon

Comprehensive fuse box diagrams and specifications for the 2019-Present BMW 330i.

Alternator Testing and Diagnostics

Coming Soon

Technical procedures for testing the alternator and diagnosing common electrical issues.

About the Author

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