Audi A3 2021 Fuse Box Info
Passenger compartment fuse box location:
Depending on the vehicle equipment, the instrument panel fuse box may be located behind a cover, or behind the storage compartment in the area of the steering column (left-hand drive), or behind a cover in the glove compartment (right-hand drive).
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Functions |
| 3 | Trailer hitch |
| 4 | Drive components, exhaust treatment |
| 5 | Automatic transmission selector lever |
| 6 | Vehicle electrical system control module |
| 7 | Seat heating - controls |
| 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 |
| 15 | Electronic toll collection 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 |
| 65 | Exterior sound |
| 66 | Rear window wiper |
| 67 | Rear window defogger |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| 2 | Drive system control module, Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS) |
| 3 | Motor components, fuel pump, climate control system, high-voltage charger, electric drive system |
| 4 | Left headlight |
| 5 | Right headlight |
| 7 | Transmission fluid cooling |
| 8 | Brake booster |
| 9 | Horn |
| 10 | Windshield wipers |
| 11 | Climate control system |
| 12 | Transmission control module |
| 13 | Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS) |
| 14 | Auxiliary heating, sound actuator |
| 15 | Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS) |
| 16 | Automatic transmission |
| 17 | Exhaust treatment, climate control, auxiliary heating |
| 18 | Climate control, auxiliary heating |
| 21 | Drive system control module |
| 22 | Engine start |
| 23 | Drive system control module |
| 24 | Engine components, diesel module, exhaust treatment, fuel leak diagnosis, oil level and oil temperature sensor, engine cooling |
| 25 | Engine components, exhaust treatment |
| 26 | Engine components, exhaust doors, fuel leak diagnosis, engine cooling, transmission fluid cooling, exhaust treatment |
| 27 | Heated oxygen sensors |
| 28 | Engine components |
| 29 | Fuel pump, transmission control module |
| 30 | Engine cooling |
| 33 | Climate control, auxiliary heating |
