Table of Contents
The A3 is a small family class hatchback produced by Audi since 1996. The fourth generation was first presented in March 2020. The car is produced on the Volkswagen Group MQB platform, on which the Volkswagen Golf VIII, SEAT Leon Mk4 and Škoda Octavia Mk4 are also built. In this material we will understand in detail fuse box diagrams Audi A3 (4th generation; MQB platform; codename 8Y) 2020, 2021, 2022, 2023, 2024 model years.
Here you will find the location and photos of distribution boxes. The fuses responsible for the “Cigarette lighter” and “Fuel Pump” are highlighted in bold.
In the engine compartment
The fuse box is located on the left side behind the protective cover.
General view.
| Diagram | |
|---|---|
|
|
| № | Description |
| 2 | Drive system control module, Electronic Stability Control (ESC), Anti-lock Brake System (ABS) |
| 3 | Engine components, fuel pump (petrol pump fuse), climate control system, high voltage charger, electrical drive system |
| 4 | Left headlamp |
| 5 | Right headlight |
| 7 | Transmission fluid cooling |
| 8 | Brake booster |
| 9 | Horn |
| 10 | Windscreen wipers |
| 11 | Climate control system |
| 12 | Transmission control module |
| 13 | Electronic Stability Control (ESC), Anti-lock Braking System (ABS) |
| 14 | Auxiliary heating, audio actuator |
| 15 | Electronic Stability Control (ESC), Anti-lock Braking System (ABS) |
| 16 | Automatic transmission |
| 17 | Exhaust aftertreatment, climate control, auxiliary heating |
| 18 | Climate control, auxiliary heating |
| 21 | Drive system control module |
| 22 | Engine start |
| 23 | Drive control module |
| 24 | Engine components, diesel module, exhaust gas cleaning, fuel leakage diagnostics, oil level and temperature sensor, engine cooling |
| 25 | Engine components, exhaust gas cleaning |
| 26 | Engine components, exhaust hatches, fuel leak diagnostics, engine cooling, transmission fluid cooler, exhaust treatment |
| 27 | Heated oxygen sensors |
| 28 | Engine Components |
| 29 | Fuel pump, transmission control module |
| 30 | Engine cooling |
| 33 | Climate control, auxiliary heating |
In the passenger compartment
The fuse box is located on the driver's side of the dashboard behind the storage box.
General view.
| Diagram | |
|---|---|
|
|
| № | Designation of fuses |
| 3 | Trailer coupling |
| 4 | Drive components, exhaust gas treatment |
| 5 | Automatic transmission selector lever |
| 6 | Vehicle electrical system control module |
| 7 | Seat heating controls, electrical system control module |
| 8 | Panoramic glass roof |
| 9 | Driver's side front door control module, driver's side rear power window control module |
| 11 | Trailer hitch |
| 12 | Vehicle electrical system control module |
| 13 | Vehicle electrical system control module |
| 14 | Sound system |
| 16 | Airbag control module |
| 17 | Exhaust gas treatment |
| 18 | Steering column lock, easy access and start authorisation control module |
| 19 | Dashboard, emergency call module |
| 20 | Infotainment system, USB input |
| 21 | Control module for driver assistance systems, camera systems, side assistance, luggage compartment lid |
| 23 | Lumbar support on front passenger side |
| 24 | Four-wheel drive control module |
| 25 | Left front seatbelt tensioner |
| 26 | Front passenger side door control module, power windows on rear passenger side |
| 27 | Right front seatbelt tensioner |
| 28 | Emergency disconnection point for the high-voltage battery |
| 29 | Trailer hitch |
| 30 | Infotainment system |
| 31 | Trailer hitch |
| 33 | Driver's side lumbar support |
| 35 | Vehicle electrical system control module |
| 36 | Climate control system blower |
| 37 | Luggage compartment lid control module |
| 39 | Steering column electronics |
| 40 | Anti-theft alarm system |
| 41 | Diagnostic interface |
| 42 | Automatic transmission selector lever |
| 43 | Tyre pressure monitoring, climate control controls, auxiliary heating, cabin temperature sensor, rear window heater relay |
| 44 | Particle sensor, roof electronics control unit, parking brake button, anti-theft alarm system, diagnostic connection, headlight range control, garage door opener control module, light switch, light/rain sensor |
| 45 | Steering column electronics |
| 46 | Volume control, centre display, head-up display |
| 47 | Suspension control |
| 48 | USB input |
| 52 | 12-volt socket (Audi A3 cigarette lighter fuse) |
| 58 | Driver assistance control module, front camera, parking assist system |
| 59 | Climate control system, exterior audio, rear view mirror, tail lamp switch, centre console switch panel, air quality sensor, 12-volt socket relay |
| 60 | Diagnostic connection |
| 61 | Clutch position sensor, electrical drive system, high-voltage battery |
| 64 | Passenger side occupant detection system, passenger airbag deactivation warning lamp |
| 65 | Exterior sound |
| 66 | Rear window wiper |
| 67 | Rear window defroster |
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