The Audi A1, a compact hatchback, has been in production since 2010. The second iteration of the A1, manufactured in the United Kingdom (UK), was introduced in 2018. This piece offers fuse box diagrams for the 2019-2022 Audi A1 UK model.
Fuses play a crucial role in safeguarding your car’s electrical system. A blown fuse indicates the presence of a short circuit or another issue within the electrical system. If you suspect a blown fuse, you can inspect it using either a multimeter or a fuse tester. Should the fuse be blown, it’s essential to replace it with a fuse of equivalent amperage.
The Audi A1 encompasses three fuse boxes: one within the passenger compartment, another beneath the hood, and the third in the trunk. The fuse box diagrams included in this article illustrate the precise location of each fuse and relay within the fuse boxes, alongside the respective amperage ratings.
Table of Contents
Instrument Panel
| Fuse Number | Fuse Amp. Rating | Function /component |
|---|---|---|
| SC1 | – | – |
| SC2 | – | – |
| SC3 | 30A | Digital sound package control unit |
| SC4 | – | – |
| SC5 | – | – |
| SC6 | 40A | Onboard supply control unit |
| SC7 | – | – |
| SC8 | 30A | Fresh air blower control unit |
| SC9 | – | – |
| SC10 | – | – |
| SC11 | – | – |
| SC12 | 7.5A | Front left seat belt |
| SC13 | 7.5A | Light switch Rain and light sensor Anti-theft alarm sensor Control unit for cornering light and headlight range control Storage compartment illumination bulb Light 1 for dashboard ambient lighting Light 2 for dashboard ambient lighting Diagnostic connection Light for driver door ambient lighting Light for passenger door ambient lighting Light 2 for driver door ambient lighting Light 2 for front passenger door ambient lighting Front roof module |
| SC14 | – | – |
| SC15 | 7.5A | Control unit in dash panel insert Emergency call module control unit and communication unit |
| SC16 | 40A | Onboard supply control unit |
| SC17 | 30A | 2018: Front passenger door control unit Rear passenger door control unit 2019-2022: Driver door control unit (right-hand drive) Front passenger door control unit (left-hand drive) Control unit with rear driver side window regulator motor (right-hand drive) Control unit with rear passenger side window regulator motor (left-hand drive) |
| SC18 | – | – |
| SC19 | 25A | Control unit 1 for information electronics |
| SC20 | 30A | Heated rear window relay |
| SC21 | – | – |
| SC22 | 7.5A | 2019-2022: Multimedia system operating unit |
| SC23 | 7.5A | Reversing camera system control unit |
| SC24 | 7.5A | Driver side volume regulator (2018-2019) Multimedia system operating unit (2018-2019) Charger 1 for mobile devices Aerial amplifier for mobile telephone USB hub |
| SC25 | 7.5A | 2019-2022: Driver side volume regulator |
| SC26 | 7.5A | Data bus diagnostic interface |
| SC27 | 7.5A | Electronically controlled damping control unit |
| SC28 | 7.5A | Ignition/starter switch Steering column electronics control unit |
| SC29 | 7.5A | Alarm horn |
| SC30 | 7.5A | Front right seat belt |
| SC31 | 15A | Heater and air conditioning controls |
| SC32 | 7.5A | Front left headlight |
| SC33 | 30A | 2018: Driver door control unit Control unit with rear driver side window regulator motor 2019-2022: Driver door control unit (left-hand drive) Front passenger door control unit (right-hand drive) Control unit with rear driver side window regulator motor (left-hand drive) Control unit with rear passenger side window regulator motor (right-hand drive) |
| SC34 | 7.5A | Front right headlight |
| SC35 | 40A | Onboard supply control unit |
| SC36 | 20A | Dual tone horn relay |
| SC37 | 30A | Onboard supply control unit |
| SC38 | 30A | Onboard supply control unit |
| SC39 | 10A | Adaptive cruise control unit Parking aid control unit Blind Spot Monitor control unit Blind Spot Monitor control unit 2 Front camera for driver assist systems |
| SC40 | 7.5A | Interior mirror Centre switch module in dash panel Diagnostic connection |
| SC41 | 7.5A | Relay for power sockets |
| SC42 | 7.5A | Clutch position sender Pressure sender for refrigerant circuit Control unit for structure-borne sound Starter relay 1 Starter relay 2 |
| SC43 | 7.5A | Rear window wiper motor |
| SC44 | 7.5A | Airbag control unit Front roof module |
| SC45 | – | – |
| SC46 | 7.5A | Starter inhibitor and reversing lights switch |
| SC47 | 7.5A | Front roof module |
| SC48 | 7.5A | Entry and start authorisation control unit Control unit for electronic steering column lock |
| SC49 | – | – |
| SC50 | – | – |
| SC51 | – | – |
| SC52 | – | – |
| SC53 | 7.5A | Selector lever Ignition key withdrawal lock solenoid |
| SC54 | – | – |
| SC55 | – | – |
| SC56 | – | – |
| SC57 | – | – |
| SC58 | 20A | 12V socket |
| SC59 | – | – |
| SC60 | – | – |
| SC61 | – | – |
Engine Compartment
| Fuse Number | Fuse Amp. Rating | Function/component |
|---|---|---|
| SB1 | 15A | Engine control unit |
| SB2 | 7.5A/10A | Charge air cooling pump (1.5L, 2.0L petrol) Continued coolant circulation pump (1.0L petrol) Vacuum pump relay (1.5L petrol) Exhaust flap control unit (1.5L petrol) Fuel metering valve (1.0L petrol) |
| SB3 | 15A | Lambda probe 1 before catalytic converter Lambda probe 1 after catalytic converter |
| SB4 | 15A | Fuel pump control unit Engine component current supply relay (2.0L petrol) |
| SB5 | 10A/15A | Oil level and oil temperature sender Activated charcoal filter solenoid valve 1 (1.0L, 1.5L petrol) Camshaft control valve 1 (1.0L, 1.5L petrol) Turbocharger air recirculation valve (2.0L petrol) Intake manifold flap valve (2.0L petrol) Exhaust camshaft control valve 1 (1.0L, 1.5L petrol) Valve for oil pressure control Piston cooling jet control valve Inlet cam actuator for cylinder 2 (1.5L petrol) Exhaust cam actuator for cylinder 2 (1.5L petrol) Inlet cam actuator for cylinder 3 (1.5L petrol) Exhaust cam actuator for cylinder 3 (1.5L petrol) Radiator fan |
| SB6 | 20A | Ignition coil 1~4 with output stage (1.0L, 1.5L petrol) |
| SB7 | 10A/15A | Vacuum pump for brakes (1.0L petrol) Vacuum pump relay (1.5L petrol) Coolant valve for gearbox (2.0L petrol) |
| SB8 | 10A | Actuator 1~8 for camshaft adjustment (2.0L petrol) Injector 2 for cylinder 1~4 (2.0L petrol) Engine component current supply relay (2.0L petrol) |
| SB9 | 7.5A | Brake light switch |
| SB10 | 7.5A | Battery monitor control unit |
| SB11 | – | – |
| SB12 | 10A | Ar conditioner compressor regulating valve |
| SB13 | 10A | Front drive battery module (with battery in luggage compartment) |
| SB14 | 7.5A | ABS control unit Main relay Engine control unit |
| SB15 | 30A | Mechatronic unit for dual clutch gearbox |
| SB16 | – | – |
| SB17 | 7.5A | Engine control unit |
| SB18 | 30A | Starter |
| SB19 | 30A | Wiper motor relay 1 Wiper motor relay 2 |
| SB20 | 60A | ABS control unit |
| SB21 | 25A | ABS control unit |
| SB22 | – | – |
| SB23 | – | – |
| SB24 | – | – |
| SB25 | – | |
| SB26 | 50A | Radiator fan (2.0L petrol) |
Main Fuses (-SA-)
| Fuse Number | Fuse Amp. Rating | Function/component |
|---|---|---|
| SA1 | 350A | With front battery: Starter |
| SA1 | 200A | With rear battery: Alternator |
| SA2 | – | – |
| SA3 | 150A | Fuse holder B (-SB-) Fuses # 10, 16, 19, 24, 26 Main relay |
| 508 | – | Battery |
| SA4 | 80A | Fuse holder C (-SC-) Fuses # 12, 21 |
| SA5 | 125A | Fuse holder C (-SC-) Fuses # 28, 37 Relay for power sockets |
| SA6 | 80A | Power steering control unit |
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Tom Smith is a passionate car mechanic and automotive enthusiast, specializing in the intricate world of car fuse boxes. With years of hands-on experience under the hood, he has earned a reputation as a reliable expert in his field. As the founder and content creator of the popular blog website 'carsfuse.com,' Tom has dedicated himself to sharing his extensive knowledge of car fuse boxes and electrical systems with the world.