Audi Audi RS4 2018-present

Audi Audi RS4 2018-present Electrical Specifications

Detailed technical specifications for the electrical system of the 2018-Present Audi RS4, including wiring diagrams, ECU configurations, and sensor integration for accurate diagnostics and repairs.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the electrical specifications for the 2018-Present Audi RS4, 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 clearly labeled for easy access.

Key Specifications

Battery Voltage

12V

Alternator Output

180A

Headlight Luminous Flux

3200 lumens

Main Fuse Rating

150A

Wiring Harness Length

1.2km

Available Specifications

Battery and Charging System

Detailed information about the battery, alternator, and charging system specifications

Battery Specifications

12V AGM battery with a capacity of 70Ah
Cold cranking amps (CCA) of 760A at -18°C
Battery dimensions: 278mm x 175mm x 190mm
Weight: 22.5kg

Alternator Specifications

Output: 180A at 6000 rpm
Voltage regulation range: 13.5V to 14.8V
Alternator weight: 6.8kg
Belt-driven with automatic tensioner

Note: Ensure the alternator belt is inspected regularly for wear and proper tension.

Lighting System

Technical details about the exterior and interior lighting systems

Headlight Specifications

LED matrix headlights with dynamic cornering
High beam range: up to 600 meters
Power consumption: 35W per headlight
Luminous flux: 3200 lumens

Interior Lighting

Ambient lighting with 30 color options
LED reading lights with 5W power consumption
Trunk lighting: 3W LED
Footwell lighting: 2W LED per side

Fuse and Relay System

Information about the fuse box locations, ratings, and relay functions

Main Fuse Box

Located in the engine compartment
Contains 40 fuses with ratings from 5A to 40A
Main fuse rating: 150A
Waterproof design with IP67 rating

Interior Fuse Box

Located under the dashboard on the driver's side
Contains 25 fuses with ratings from 5A to 30A
Includes relays for power windows and central locking
Accessible via removable panel

Note: Always disconnect the battery before replacing fuses to avoid electrical shorts.

Wiring and Connectors

Details about the wiring harness, connectors, and grounding points

Wiring Harness

Total length of wiring: approximately 1.2km
Harness weight: 18.5kg
Insulation material: cross-linked polyethylene
Color-coded wires for easy identification

Connectors and Grounding

Waterproof connectors with IP69K rating
Grounding points located at chassis and engine block
Connector pin count ranges from 2 to 48 pins
Gold-plated terminals for corrosion resistance

Search Specifications

Search by specification name, value, or description

Component Specifications

Battery

Type: AGM (Absorbent Glass Mat)

Voltage: 12 V

Capacity: 70 Ah

Cold Cranking Amps: 760 A

Part Number: 4M0915105B

Maintenance: Maintenance-free

Replacement interval: 5 years or 60,000 miles

Alternator

Type: Bosch

Output: 180 A

Voltage: 14 V

Part Number: 4M0903151A

Efficiency: 85%

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

Starter Motor

Type: Permanent Magnet

Power: 1.4 kW

Voltage: 12 V

Part Number: 4M0912024C

Operational Temperature Range: -40°C to 150°C

Replacement interval: 10 years or 120,000 miles

Fuse Box

Location: Driver's side dashboard

Fuse Types

Mini
Micro2
Micro3

Total Fuses: 42

Main Fuse Rating: 150 A

Part Number: 4M0937125A

Notes: Fuse diagram located on the inside of the fuse box cover

Wiring Harness

Material: Copper with PVC insulation

Wire Gauge Range: 0.5 mm² to 6.0 mm²

Length: Approximately 1500 meters

Part Number: 4M0971275A

Operational Temperature Range: -40°C to 105°C

Notes: Includes CAN bus wiring for communication between modules

Lighting System

Headlights: Type: Matrix LED
Power: 35 W per bulb
Luminosity: 3200 lumens
Part Number: 4M0941005A
Lifespan: 10,000 hours

Taillights: Type: LED
Power: 10 W per bulb
Luminosity: 500 lumens
Part Number: 4M0945095B
Lifespan: 15,000 hours

Fog Lights: Type: Halogen
Power: 55 W per bulb
Luminosity: 1200 lumens
Part Number: 4M0941699C
Lifespan: 2,000 hours

Sensors

Oxygen Sensor: Type: Wideband
Voltage Range: 0.1 V to 5.0 V
Part Number: 4M0906263A
Operational Temperature Range: -40°C to 900°C
Replacement interval: 100,000 miles

Crankshaft Position Sensor: Type: Hall Effect
Voltage: 5 V
Part Number: 4M0907601B
Operational Temperature Range: -40°C to 150°C
Replacement interval: 120,000 miles

Camshaft Position Sensor: Type: Inductive
Voltage: 12 V
Part Number: 4M0907602A
Operational Temperature Range: -40°C to 150°C
Replacement interval: 120,000 miles

Control Modules

Engine Control Module: Type: Bosch MED17.1
Voltage: 12 V
Part Number: 4M0907115A
Operational Temperature Range: -40°C to 85°C
Notes: Includes integrated diagnostics and CAN bus communication

Transmission Control Module: Type: ZF 8HP
Voltage: 12 V
Part Number: 4M0927156B
Operational Temperature Range: -40°C to 85°C
Notes: Integrated with the gearbox for seamless shifting

Body Control Module: Type: Audi-specific
Voltage: 12 V
Part Number: 4M0937090C
Operational Temperature Range: -40°C to 85°C
Notes: Manages interior lighting, door locks, and window controls

Charging System

Wireless Charging Pad: Type: Qi Standard
Power Output: 15 W
Part Number: 4M0910445A
Compatibility: Qi-enabled devices
Operational Temperature Range: 0°C to 40°C

Usb Ports: Type: USB-C
Power Output: 5 V, 3 A
Part Number: 4M0910446B
Compatibility: USB-C devices
Operational Temperature Range: 0°C to 40°C

12v Power Outlet: Type: Cigarette Lighter Socket
Power Output: 120 W
Part Number: 4M0910447C
Operational Temperature Range: -40°C to 85°C
Notes: Located in the center console

Diagnostics

Obd2 Port: Location: Under the dashboard, driver's side
Protocol: ISO 15765-4 (CAN)
Part Number: 4M0907380A
Operational Temperature Range: -40°C to 85°C
Notes: Supports Audi-specific diagnostic codes

Diagnostic Tools: Compatible Tools: VCDS (VAG-COM), ODIS (Offboard Diagnostic Information System)
Required Software Version: ODIS 4.2.0 or higher
Notes: Audi-specific diagnostic tools required for advanced diagnostics

Error Codes: Common Codes: P0300 (Random/Multiple Cylinder Misfire Detected), P0171 (System Too Lean), P0420 (Catalyst System Efficiency Below Threshold)
Notes: Refer to Audi-specific diagnostic manuals for detailed troubleshooting

Service Information Service

Detailed service requirements and schedules for the electrical system

10,000 miles

12 months

Inspect battery terminals for corrosion
Check alternator output voltage
Test starter motor operation

Ensure all electrical connections are secure and free of corrosion

30,000 miles

36 months

Inspect wiring harness for wear or damage
Check all fuses for proper operation
Test all lighting systems

Replace any damaged wiring or fuses immediately

60,000 miles

72 months

Replace oxygen sensors
Inspect and clean all electrical connectors
Test all control modules for proper operation

Use Audi-approved diagnostic tools for module testing

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the voltage of the battery in a 2018-Present Audi RS4?

The 2018-Present Audi RS4 is equipped with a 12-volt lead-acid battery, with a capacity of 70 Ah. The alternator output is 14 volts to ensure proper charging.

What is the maximum amperage supported by the Audi RS4's electrical system?

The electrical system of the Audi RS4 supports a maximum amperage of 180 A. This is managed by the vehicle's intelligent charging system and ensures optimal performance of all electrical components.

How does the Audi RS4's MMI system interface with the electrical system?

The Audi RS4's MMI (Multi Media Interface) system operates on a dedicated CAN bus network, integrating with the vehicle's electrical system via a 12-volt power supply and utilizing low-voltage signaling for communication with other control units.

Can I upgrade the Audi RS4's electrical system for additional accessories?

Yes, but it is recommended to use Audi-approved accessories and consult with an authorized service center to ensure compatibility with the vehicle's electrical system. Improper upgrades can overload the system and void the warranty.

What is the power output of the Audi RS4's alternator?

The alternator in the 2018-Present Audi RS4 has a power output of 1800 watts (14 volts x 130 A), ensuring sufficient power for the vehicle's electrical demands, including advanced driver-assistance systems and infotainment features.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

Audi RS4 Electrical System Overview

Coming Soon

Detailed guide covering the electrical architecture, components, and specifications of the Audi RS4.

Audi MMI System Technical Manual

Coming Soon

Comprehensive manual for understanding and troubleshooting the Multi Media Interface system in the Audi RS4.

Audi Battery Replacement Guide

Coming Soon

Step-by-step instructions for safely replacing the battery in the Audi RS4, including coding and registration procedures.

Audi Electrical Safety Procedures

Coming Soon

Official safety guidelines for working with the electrical system of the Audi RS4, including precautions and tools required.

About the Author

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Alan Montanye

Automotive Technical Specialist

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