Audi A3 (8Y) | 2020-2025 | Fuse Box Diagrams and Locations
The fourth-generation (Mk4) Audi A3 and S3 (chassis code 8Y), a luxury compact car and its high-performance counterpart, has been available from 2020 to the present. Renowned for its modern design, advanced technology, and dynamic performance, this generation sets a new standard in the premium compact segment.
In this article, you’ll find fuse box diagrams for Audi A3 and S3 models from 2020, 2021, 2022, 2023, 2024 and 2025. These diagrams provide crucial information about the fuse layout and relay assignments, empowering owners and technicians to effectively maintain and troubleshoot the vehicle’s electrical system.
What You’ll Learn:
Fuse Box Diagrams: Detailed visual layouts for accurate identification.
Fuse Panel Locations: Clear instructions on where to locate the fuse panels in the car.
Fuse Assignments: Comprehensive descriptions of each fuse and relay for targeted troubleshooting and maintenance.
This guide is an essential resource for Audi A3 and S3 (8Y) owners who want to keep their vehicles performing at their best. Whether you’re addressing an electrical issue, replacing a fuse, or performing routine maintenance, this information ensures a seamless and efficient process.
Maintain your Audi A3/S3 (8Y) with confidence using this in-depth fuse box guide!
LHD vehicles: Depending on the vehicle equipment, the fuses may be located behind a cover (1) or behind the storage compartment (2) in the area of the steering column.
RHD vehicles: The fuses are located behind a cover in the glove compartment.
Engine Compartment
Fuse Box Diagrams
Instrument Panel Fuse Box
Assignment of the fuses in the passenger compartment fuse box
№
Equipment
3
Trailer hitch
4
Drive components, exhaust 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
Control module for front driver’s side door, rear driver’s side power window
11
Trailer hitch
12
Vehicle electrical system control module
13
Vehicle electrical system control module
14
Sound system
16
Airbag control module
17
Exhaust treatment
18
Steering column lock, convenience access and start authorization control module
19
Instrument cluster, emergency call module
20
Infotainment system, USB input
21
Driver assistance systems control module, camera systems, side assist, luggage compartment lid
23
Front passenger’s side lumbar support
24
All wheel drive control module
25
Left front safety belt tensioner
26
Front passenger’s side door control module, rear passenger’s side power window
27
Right front safety belt tensioner
28
High-voltage battery emergency cut-off point
29
Trailer hitch
30
Infotainment system
31
Trailer hitch
33
Front 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
Tire pressure monitoring, climate control system controls, auxiliary heating, interior temperature sensor, rear window heater relay
44
Particulate matter sensor, roof electronics control module, parking brake button, anti-theft alarm, diagnostic connection, headlight range control, garage door opener control module, light switch, light/ rain sensor
45
Steering column electronics
46
Volume control, center display, head-up display
47
Suspension control
48
USB input
52
12 volt socket
58
Driver assistance systems control module, front camera, parking aid
59
Climate control system, exterior sound, rearview mirror, back-up light switch, center console switch panel, air quality sensor, 12 volt socket relay
60
Diagnostic connection
61
Clutch position sensor, electric drive system, high-voltage battery
64
Passenger’s side passenger occupant detection system, passenger’s airbag OFF warning light
