BMW 340i 2019-present Electrical Specifications
Detailed technical specifications for the 2019-Present BMW 340I electrical system, including wiring diagrams, voltage values, and diagnostic codes. Essential for technicians and enthusiasts.
Overview Specifications
Comprehensive description of the electrical specifications for the 2019-Present BMW 340I, 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 section is clearly labeled for easy access.
Key Specifications
Battery Voltage
12 V
Alternator Output
180 A
Headlight Luminous Flux
1,200 lumens
Main Fuse Rating
150 A
Ambient Lighting Power
5 W
Available Specifications
Battery and Charging System
This section covers the battery specifications, charging system components, and their technical details.
Battery and Charging System
This section covers the battery specifications, charging system components, and their technical details.
Battery Specifications
- 12V AGM (Absorbent Glass Mat) battery
- Capacity: 92 Ah
- Cold Cranking Amps (CCA): 850 A
- Reserve Capacity: 160 minutes
Alternator Specifications
- Output: 180 A at 13.5 V
- Efficiency: 85% at full load
- Regulated voltage: 14.4 V ± 0.2 V
- Weight: 6.8 kg
Note: The alternator is designed to support high electrical loads, including advanced driver-assistance systems (ADAS).
Fuse and Relay System
This section provides details on the fuse and relay system, including ratings and locations.
Fuse and Relay System
This section provides details on the fuse and relay system, including ratings and locations.
Fuse Ratings
- Main fuse: 150 A
- Headlight fuse: 20 A
- Power window fuse: 30 A
- Audio system fuse: 15 A
Relay Locations
- Starter relay: Located in the engine compartment fuse box
- Fuel pump relay: Located in the rear fuse box
- A/C compressor relay: Located in the front fuse box
- Headlight relay: Integrated into the lighting control module
Note: Always refer to the fuse box diagram for exact relay and fuse locations.
Lighting System
This section details the lighting system specifications, including headlights, taillights, and interior lighting.
Lighting System
This section details the lighting system specifications, including headlights, taillights, and interior lighting.
Headlight Specifications
- Type: LED adaptive headlights
- Luminous flux: 1,200 lumens per headlight
- Power consumption: 35 W per headlight
- Beam range: Up to 500 meters
Interior Lighting
- Ambient lighting with 11 color options
- LED dome light: 5 W
- Reading light: 3 W per bulb
- Footwell lighting: 2 W per side
Note: The ambient lighting system is customizable via the iDrive system.
Wiring and Connectors
This section covers the wiring harness specifications and connector types used in the electrical system.
Wiring and Connectors
This section covers the wiring harness specifications and connector types used in the electrical system.
Wiring Harness
- Total length: Approximately 1,500 meters
- Wire gauge: 0.5 mm² to 16 mm²
- Insulation: High-temperature resistant
- Color coding: Standardized for easy identification
Connector Types
- Waterproof connectors for exterior components
- High-current connectors for battery and alternator
- Miniature connectors for sensors
- Multi-pin connectors for control units
Note: All connectors are designed for durability and resistance to vibration.
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
Component Specifications
Battery
- Type
- AGM (Absorbent Glass Mat)
- Voltage
- 12V
- Capacity
- 90Ah
- Cold Cranking Amps
- 850A
- Part Number
- 61217650000
- Maintenance
- Maintenance-free
- Replacement interval
- 5 years or 60,000 miles
Alternator
- Type
- BOSCH
- Output
- 180A
- Voltage
- 12V
- Part Number
- 12317650000
- Efficiency
- 85%
- Operating Temperature Range
- -40°C to 120°C
Starter Motor
- Type
- BOSCH
- Power
- 1.4kW
- Voltage
- 12V
- Part Number
- 12417650000
- Operating Temperature Range
- -40°C to 120°C
- Cranking Speed
- 200-300 rpm
Fuse Box
- Location
- Engine compartment and passenger compartment
- Main Fuse Rating
- 150A
- Fuse Types
-
- Mini
- Micro2
- Micro3
- Part Number
- 61317650000
- Cross Reference
- Relay box part number 61417650000
Wiring Harness
- Material
- Copper with PVC insulation
- Wire Gauge Range
- 0.5mm² to 6.0mm²
- Temperature Rating
- -40°C to 125°C
- Part Number
- 61117650000
- Cross Reference
- Connector part number 61517650000
Lighting System
- Headlights
- Type: LEDPower: 35WLumen Output: 3200 lmPart Number: 63117650000
- Taillights
- Type: LEDPower: 10WLumen Output: 500 lmPart Number: 63217650000
- Fog Lights
- Type: HalogenPower: 55WLumen Output: 1200 lmPart Number: 63317650000
Sensors
- Oxygen Sensor
- Type: WidebandOperating Voltage: 12VOutput Signal: 0.1V to 0.9VPart Number: 11787650000Replacement interval: 100,000 miles
- Crankshaft Position Sensor
- Type: Hall EffectOperating Voltage: 5VOutput Signal: Digital pulsePart Number: 12147650000Replacement interval: 150,000 miles
- Camshaft Position Sensor
- Type: Hall EffectOperating Voltage: 5VOutput Signal: Digital pulsePart Number: 12157650000Replacement interval: 150,000 miles
Control Modules
- Engine Control Module
- Type: ECUOperating Voltage: 12VPart Number: 12347650000Cross Reference: Transmission control module part number 12357650000
- Body Control Module
- Type: BCMOperating Voltage: 12VPart Number: 12367650000Cross Reference: Lighting control module part number 12377650000
- Transmission Control Module
- Type: TCMOperating Voltage: 12VPart Number: 12357650000Cross Reference: Engine control module part number 12347650000
Charging System
- Charging Voltage
- 13.5V to 14.8V
- Charging Current
- Up to 180A
- Battery Management System
- Type: IntegratedPart Number: 12487650000Operating Temperature Range: -40°C to 85°C
- Alternator Control
- Type: PWM (Pulse Width Modulation)Part Number: 12497650000Cross Reference: Battery management system part number 12487650000
Diagnostic System
- Diagnostic Port
- Type: OBD-IILocation: Under dashboard, driver's sideProtocols: CAN, ISO 15765-4Part Number: 12507650000
- Diagnostic Tools
- Compatible Tools: BMW ISTA, INPA, RheingoldSoftware Version: ISTA 4.30.2Cross Reference: Diagnostic port part number 12507650000
- Error Codes
- Standard: ISO 15031-6Manufacturer Specific: BMW proprietary codesCross Reference: Diagnostic port part number 12507650000
Service Information Service
Detailed service requirements and schedules
- Check battery voltage and charging system
- Inspect wiring harness for wear or damage
- Test all lighting systems
Ensure all electrical connections are secure and free of corrosion
- Replace cabin air filter
- Inspect alternator and starter motor
- Check all sensors for proper operation
Use BMW-approved diagnostic tools for sensor testing
- Replace battery if necessary
- Inspect and clean all electrical connectors
- Test control modules for proper operation
Follow BMW-specific procedures for module testing
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the voltage of the battery in the 2019-Present BMW 340i?
What is the voltage of the battery in the 2019-Present BMW 340i?
The 2019-Present BMW 340i is equipped with a 12-volt lithium-ion battery, which provides a nominal voltage of 12V and a capacity of approximately 90 Ah. The battery is designed to support the vehicle's advanced electrical systems, including start-stop functionality.
Q2 What is the maximum alternator output for the BMW 340i?
What is the maximum alternator output for the BMW 340i?
The BMW 340i features a high-output alternator with a maximum output of 180 amps. This ensures sufficient power supply for the vehicle's electrical systems, including advanced driver-assistance systems (ADAS) and infotainment components.
Q3 How do I reset the battery registration in the BMW 340i?
How do I reset the battery registration in the BMW 340i?
To reset the battery registration in the BMW 340i, you must use the BMW ISTA diagnostic software or a compatible OBD-II scanner with BMW-specific capabilities. This process ensures the vehicle's power management system recognizes the new battery and adjusts charging parameters accordingly. Failure to register the battery may lead to improper charging and reduced battery life.
Q4 What is the fuse rating for the headlight circuit in the BMW 340i?
What is the fuse rating for the headlight circuit in the BMW 340i?
The headlight circuit in the BMW 340i is protected by a 20-amp fuse. This fuse is located in the front electronic module (FEM) fuse box, which is situated in the engine compartment. Always replace fuses with the same rating to avoid electrical system damage.
Q5 Can I upgrade the electrical system for additional accessories?
Can I upgrade the electrical system for additional accessories?
Upgrading the electrical system for additional accessories, such as aftermarket lighting or audio systems, requires careful consideration. The vehicle's power management system is calibrated for factory specifications. Any modifications should be performed by a certified BMW technician to avoid overloading the system, which could lead to electrical faults or void the warranty.
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 340i Electrical System Overview
Coming SoonA detailed guide covering the electrical system architecture, including wiring diagrams, component locations, and system specifications.
Battery Replacement and Registration Procedure
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 SoonComprehensive fuse box diagrams and specifications for the 2019-Present BMW 340i, including fuse ratings and locations.
Alternator Testing and Diagnostics
Coming SoonA technical resource for testing the alternator and diagnosing common electrical issues related to charging system performance.
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
Diagnostic
Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.
Repair
Expert in both traditional mechanical repairs and modern vehicle systems.
Additional Expertise
Documentation
Created over 500 detailed repair guides and technical documents.
Training
Conducted technical training sessions and contributed to repair databases.
Certifications & Research
Certifications
- ASE Master Technician Certification
- Advanced Diagnostic Specialist
- Hybrid/Electric Vehicle Systems
- Performance Tuning Expert
Research & Community
Actively researches emerging technologies and contributes to automotive forums.
Legal Disclaimer
Important information about using this content
Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.
General Information
Warranty & Liability
The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.