2023 Audi A4 Service and Repair Manual

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Covers all 2023 A4 trims — Select Sedan 4-Door, S Line Sedan 4-Door, Dynamic Sedan 4-Door ·
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2023 Audi A4 service and repair manual a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What's included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Wiring diagrams and electrical sections
  • Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

  • Select Sedan 4-Door
  • S Line Sedan 4-Door
  • Dynamic Sedan 4-Door

Engines covered

  • 2.0L 1984CC 121Cu. In. l4 MILD HYBRID EV-GAS (MHEV) DOHC Turbocharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams
No active recalls The 2023 Audi A4 has no recalls on file with NHTSA.
TSB #11033492

This bulletin provides informaiotn when the starter battery is discharged or defective.

TSB #11033483

This bulletin provides information when the convenience openeing does not work.

TSB #11033475

The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content (energy density) being reduced. This reduction in the energy content, which is due to factors. Revised header. Adde

TSB #11033474

This bulletin provides information when there are noises after selecting a ear while idling and the vehicle is stationary, or while driving.

TSB #11033473

This bulletin provides information when there is noise from the backrest of the front seat.

TSB #11033469

This bulletin provides informaiton when the windscreen/rear window washer pump is not working (B126101, B126113).

TSB #11033466

This bulletin provides informaiton when traffic jam assist is unavailable/active lane assist fault is reported in the instrument cluster.

TSB #11033465

This bulletin provides informatin when there is binding or vibrations in tight turns with quattro Ultra.

Showing the 8 most recent of 810 technical service bulletins on file with NHTSA.

20250916Component: LANE DEPARTURE: WARNINGCrash reported1 injured

While driving southbound on [XXX] near [XXX] in Mississippi, the advanced driver-assistance systems (lane assist and radar) did not operate as designed. At highway speed, the vehicle gave no warnings,

20250916Component: LANE DEPARTURE: ASSISTCrash reported1 injured

While driving southbound on [XXX] near [XXX] in Mississippi, the advanced driver-assistance systems (lane assist and radar) did not operate as designed. At highway speed, the vehicle gave no warnings,

20250916Component: FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKINGCrash reported1 injured

While driving southbound on [XXX] near [XXX] in Mississippi, the advanced driver-assistance systems (lane assist and radar) did not operate as designed. At highway speed, the vehicle gave no warnings,

20250714Component: ELECTRICAL SYSTEM

I leased a 2023 Audi A4 with 0 miles. At ~10,000 miles my car automatically shut down electronically I have photo evidence of this. This happened again recently at ~45,000 miles, I almost got into a s

20250714Component: ENGINE

I leased a 2023 Audi A4 with 0 miles. At ~10,000 miles my car automatically shut down electronically I have photo evidence of this. This happened again recently at ~45,000 miles, I almost got into a s

Showing the 5 most serious of 15 complaints filed with NHTSA.

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