The Audi A1 is a subcompact luxury car that is produced by the German automaker Audi from 2010 to 2018. It is launched as a direct competitor to the Mini Cooper and is available in both three-door and five-door hatchback body styles. The S1 variant is introduced in 2014, which is the first high-performance version of the A1. The A1 and S1 models are known for their impressive build quality, high-end materials, and sporty handling.

This article will provide an in-depth guide to the electrical components of the Audi A1 and S1, with a focus on the fuse box and relay diagrams. Understanding the location and function of these components is essential for any owner or mechanic who wants to properly maintain or repair these vehicles.

Fuse Box

The fuse box in the Audi A1 and S1 is located on the left side of the dashboard, behind the storage compartment. The fuse box houses a variety of fuses that protect the electrical systems of the vehicle. Each fuse is designed to protect a specific component, and if a fuse blows, it will need to be replaced with a new one of the same amperage rating.

There are also spare fuses included in the fuse box, as well as a fuse removal tool for easy replacement. It is important to note that if multiple fuses blow at the same time, it may be an indication of a larger electrical issue that should be diagnosed by a professional mechanic. Regularly checking and replacing blown fuses can help prevent damage to the vehicle’s electrical systems.

Relay

The relays in the Audi A1 and S1 are also located in the fuse box on the left side of the dashboard. Relays are electrical switches that are activated by a control signal and allow a larger current to flow through to another component in the vehicle. There are several relays in the Audi A1 and S1, including those for the cooling fan, fuel pump, and power windows.

If a relay fails, it can cause problems with the associated component, such as a malfunctioning cooling fan or fuel pump. It is important to ensure that the relays are properly seated in the fuse box and that they are functioning correctly. If a relay needs to be replaced, it should be done with a genuine Audi part to ensure proper function and compatibility with the vehicle’s electrical system.

(2010-2018) Audi A1/Audi S1 fuse box and relay with Diagram

WARNING

  • Never replace a fuse with one that has a higher amperage rating.
  • A fuse with a too-high amperage could damage the electrical part and cause a fire.
  • On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
  • If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.

Audi A1/Audi S1 2010-2018 fuse box overview

audi a1 audi s1 2010 2018 fuse box overview
audi a1 audi s1 2010 2018 fuse box overview
  1. Fuse holder D -SD-
  2. Fuse holder A -SA-
  3. Fuse holder C -SC-
  4. Relay/fuse holder F -SF-
  5. Fuse holder B -SB-, Fuse holder H -SH-
  6. Fuse holder B -SB-

Fuse holder A -SA-

audi a1 audi s1 2010 2018 fuse holder a
audi a1 audi s1 2010 2018 fuse holder a

At battery-positive terminal (for models with battery in luggage compartment only)

No.AmpsAssignment/Designation
1Vacant
2110AOnboard supply
Engine component supply
3Vacant

Fuse holder B -SB-

No.AmpsAssignment/Designation
1175AAlternator -C-
240ALow heat output relay -J359-
Heater element for auxiliary air heater -Z35-
3110 1)AOnboard supply1)
Engine component supply1)
480APower steering control unit -J500-
550 2)A
40 3)A
Radiator fan thermal switch -F18-
Radiator fan control unit -J293-
650AAutomatic glow period control unit -J179-
760AHigh heat output relay -J360-
Battery monitor control unit -J3671)
Auxiliary heater element -Z35-

1) for models with battery in engine compartment only
2) no longer fitted, phased out (model year 2011)
3) phased-in modification (model year 2011)

Fuses in electronics box in fuse holder B -SB-/ Fuse holder H -SH-

audi a1 audi s1 2010 2018 fuse in electronic box b sb
audi a1 audi s1 2010 2018 fuse in electronic box b sb
  1. In the electronics box, in left engine compartment.
  2. For S1 version models only, from January 2014
  3. For models from November 2014 only.
No.AmpsAssignment/Designation
1110 4)A

5 5)A
Onboard supply4)
Engine component supply4)
Radiator fan control unit -J293-5)
Radiator fan -V7-5)
2250AAlternator -C-
Voltage regulator -C1-
3Battery +
480APower steering control unit -J500-
550 6)AAutomatic glow period control unit -J179-6)
Glow plug 1 -Q10-
Glow plug 2 -Q11-
Glow plug 3 -Q12-
Glow plug 4 -Q13-
650 7)A


 8)
– 9)
Radiator fan control unit -J293-7)
Radiator fan -V7-7)
 125AOnboard supply8)
Engine component supply8)
  1. for models with battery in engine compartment only, up to October 2014
  2. for models from November 2014 only
  3. for models with diesel engines only, from November 2014
  4. for models up to October 2014
  5. for models with battery in engine compartment only, from November 2014
  6. Fuse 5 on fuse holder B -SB5- bridged, (see note)

Fuses in electronics box in fuse holder H -SH-

audi a1 audi s1 2010 2018 fuse in electronic box h sh
audi a1 audi s1 2010 2018 fuse in electronic box h sh
No.AmpsAssignment/Designation
140AHeater element for auxiliary air heater -Z35-,
stage 1
230ARadiator fan control unit -J293-
Radiator fan -V7-
3Vacant
440AHeater element for auxiliary air heater -Z35-,
stage 2
540AHeater element for auxiliary air heater -Z35-,
stage 3
630AMechatronic unit for dual clutch gearbox -J743-
77.5AEngine control unit -J623-
820AWiper motor switch-over relay 1 -J368-
Wiper motor switch-over relay 2 -J369-
95ABattery monitor control unit -J367-
1010ASuppression filter -C24-
11Vacant
1210 12)A
15 13)10)11)A
Lambda probe heater -Z19-
Lambda probe 1 heater after catalytic converter -Z29-
135ABrake light switch -F-
Clutch position sender -G476-
1413)A
10 10)11)12)A
Thermal switch for air conditioning system shut-off -F163-
Fuel metering valve -N290-
Oil pressure regulation valve -N428-
Cylinder head coolant valve -N489-
Coolant circulation pump -V50-
Circulation pump -V55-
Charge air cooling pump -V188-
Auxiliary heating pump -V488-
155AOnboard supply control unit -J519-, T52c/34
Engine control unit -J623-, T91/67;T94/…
Voltage stabiliser -J532-, T12aa/4
1630AStarter motor -B-
1715 12)13)A
30 10)11)A
Engine control unit -J623-
185 10)11)A
10 12)13)A
Oil level and oil temperature sender -G266-
Fuel pump relay -J17-
Radiator fan control unit -J293-
Low heat output relay -J359-
High heat output relay -J360-
Charge pressure control solenoid valve -N75-
Recirculation valve for turbocharger -N249-
Intake manifold flap valve -N316-
Oil pressure regulation valve -N428-
Cooling oil valve -N471-
197.5 10)A
10 11)13)A
20 12)A
Engine component current supply relay -J757-
Fuel pressure regulating valve -N276-
Fuel metering valve -N290-
Injector 2 for cylinder 1 -N532-
Injector 2 for cylinder 2 -N533-
Injector 2 for cylinder 3 -N534-
Injector 2 for cylinder 4 -N535-
Actuator 1 for camshaft adjustment -F366-
Actuator 2 for camshaft adjustment -F367-
Actuator 3 for camshaft adjustment -F368-
Actuator 4 for camshaft adjustment -F369-
Actuator 5 for camshaft adjustment -F370-
Actuator 6 for camshaft adjustment -F371-
Actuator 7 for camshaft adjustment -F372-
Actuator 8 for camshaft adjustment -F373-
Vacuum pump for brakes -V192-
205 10)11)A
10 13)A
20 12)A
Automatic glow period control unit -J179-
Exhaust flap control unit -J883-
Crankcase breather heater element -N79-
Activated charcoal filter solenoid valve 1 -N80-
Camshaft control valve 1 -N205-
Exhaust camshaft control valve 1 -N318-
Continued coolant circulation pump -V51-
Sender 1 for secondary air pressure -G609-
Sender 2 for secondary air pressure -G610-

10) for models with 1.4 l diesel engine only
11) for models with 1.6 l diesel engine only
12) for models with 1.0 l/1.4 l petrol engine only
13) for models with 1.8 l/2.0 l petrol engine only

Fuse holder C -SC-

No.AmpsAssignment/Designation
Black
130ADigital sound package control unit -J525-
Voltage stabiliser -J532-
Radio -R-
240AHeater control unit -J65-
X-contact relief relay -J59-
Fresh air blower control unit -J126-
Fresh air blower -V2-
320ACigarette lighter -U1-
12 V socket -U5-
415ATrailer detector control unit -J345-
55AData bus diagnostic interface -J533-
630AFront passenger door control unit -J387-
Rear right door control unit -J389-
730ADriver door control unit -J386-
Rear left door control unit -J388-
830AHeated rear window relay -J9-
Heated rear window -Z1-
925AABS control unit -J104-
1020AOnboard supply control unit -J519-
1115AHigh tone horn -H2-
Low tone horn -H7-
Horn relay -J413-
1230AOnboard supply control unit -J519-
Brown
15AAlarm horn -H12-
Anti-theft alarm sensor -G578-
219)16)A
7.5 14)15)17)18)20)A
Terminal 30 voltage supply relay -J317-22)
Motronic current supply relay -J271-21)
Engine control unit -J623-
35AOnboard supply control unit -J519-
45A

15 23)A
ABS control unit -J104-
Voltage stabiliser 2 -J570-
All-wheel drive control unit -J492-23)
5Vacant
65ALight/rain sensor -G397-
Aerial amplifier for mobile telephone -R86-
Telephone bracket -R126-
Front roof module -WX3-
715 21)A
20 22)A
Fuel pump control unit -J538-21)
Fuel pump relay -J17-22)
810 21)AAuxiliary coolant pump relay -J496-, up to October 2014
95ASteering column electronics control unit -J527-
105ALight switch -E1-
1110AClimatronic control unit -J255-
Air conditioning system control unit -J301-
Front passenger door control unit -J387- (up to April 2012)
Rear right door control unit -J389- (up to April 2012)
16-pin connector -T16-, diagnosis connection
1210ADriver door control unit -J386- (up to April 2012)
Rear left door control unit -J388- (up to April 2012)
1310AOnboard supply control unit -J519-
1420ARelay for power sockets -J807-, for models without trailer sockets only
1530AOnboard supply control unit -J519-
1620AWiper motor switch-over relay 1 -J368-, up to October 2014
Engine component current supply relay -J757-23)24)
Ignition coil 1 with output stage -N70-23)24)
Ignition coil 2 with output stage -N127-23)24)
Ignition coil 3 with output stage -N291-23)24)
Ignition coil 4 with output stage -N292-23)24)
Red
119)20)A
20 15)16)17)A
Automatic glow period control unit -J179-
Vacuum pump for brakes -V192-
210A






34)A
Brake light switch -F- (up to October 2011)
brake pedal switch -F63- (up to October 2011)
auxiliary coolant pump relay -J496-
Lambda probe heater -Z19- (up to October 2011)
Lambda probe 1 heater after catalytic converter -Z29-, (up to October 2011)
Supply Fuse 9 on fuse holder F -SF9-, (from November 2011, up to October 2014)
Supply Fuse 10 on fuse holder F -SF10- (from November 2011, up to October 2014)
ABS control unit -J104-, from November 2011
318)19)20)A
7.5 16)A
15 14)15)17)A
Air mass meter -G70-, up to October 2014
Fuel pump relay -J17-, up to October 2014
Low heat output relay -J359-, up to October 2014
High heat output relay -J360-, up to October 2014
Engine component current supply relay -J757-, up to October 2014
Fuel pressure regulating valve -N276-, up to October 2014
Coolant circulation pump -V50-, up to October 2014
415 14)15)17)16)A
25 18)A
30 19)20)A
Engine control unit -J623-
Clutch position sender -G476-, up to October 2011
Brake light switch -F-, up to October 2011
520 18)A
15 19)20)A
20 14)15)17)A
30 16)A
Ignition coil 1 with output stage -N70-, up to October 2014
Ignition coil 2 with output stage -N127-, up to October 2014
Ignition transformer -N152-, up to October 2014
Fuel pressure regulating valve -N276-, up to October 2014
Fuel metering valve -N290-, up to October 2014
Ignition coil 3 with output stage -N291-, up to October 2014
Ignition coil 4 with output stage -N292-, up to October 2014
610A
20 16)A
Radiator fan control unit -J293-, up to October 2014
Heater element relay -J925-, up to October 2014
Charge pressure control solenoid valve -N75-, up to October 2014
Activated charcoal filter solenoid valve 1 -N80-, up to October 2014
Exhaust camshaft control valve 1 -N205-, up to October 2014
Recirculation valve for turbocharger -N249-, up to October 2014
Intake manifold flap valve -N316-, up to October 2014
Exhaust camshaft control valve 1 -N318-, up to October 2014
Switchover valve for exhaust recirculation cooler -N345-, up to October 2014
Oil pressure regulation valve -N428-, up to October 2014
Intake cam adjuster for cylinder 2 -N583-, up to October 2014
Exhaust cam adjuster for cylinder 2 -N587-, up to October 2014
Intake cam adjuster for cylinder 3 -N591-, up to October 2014
Exhaust cam adjuster for cylinder 3 -N595-, up to October 2014
Pump for exhaust recirculation cooler -V400-
75ACD changer -R41-
85AInternet access control unit -J666-
Chip card reader control unit -J676-
Radio -R-
TV tuner -R78-
95AControl unit in dash panel insert -J285-
105ARelay for automatic anti-dazzle interior mirror -J910-
Automatic anti-dazzle interior mirror -Y7-
117.5 32)A
15 33)A
Radio -R-
Control unit for information electronics 1 -J794-
125ADisplay unit for front information display and operating unit control unit -J685-

14) for models with 1.2 l petrol engine only
15) for models with 1.4 l petrol engine (90 kW) only
16) for models with 1.4 l petrol engine (103 kW) only
17) for models with 1.4 l petrol engine (136 kW) only
18) for models with 2.0 l petrol engine only
19) for models with 1.6 l diesel engine only
20) for models with 2.0 l diesel engine only
21) for models with petrol engine only
22) for models with diesel engine only
23) for models with 2.0 l petrol engine, from January 2014
24) for models with 1.8 l petrol engine, from November 2014
32) for models with MMI only
33) for models without MMI only
34) from November 2011

Fuse holder D -SD-

No.AmpsAssignment/Designation
Black
17.5AESL control unit -J764-
220ATrailer detector control unit -J345-
320ATrailer detector control unit -J345-
430A
7.5A
Mechatronic unit for dual clutch gearbox -J743-, up to October 2014
Electronically controlled damping control unit -J250-, from January 2014
530AHeadlight washer system relay -J39-
Headlight washer system pump -V11-
65AInterface control unit for vehicle location system -J843-
77.5AEntry and start authorisation control unit -J518-
815AMechatronic unit for dual clutch gearbox -J743-, up to October 2014
920ASliding sunroof motor -V1-
107.5ASelector lever sensors control unit -J587-
1115 35)AEngine component current supply relay -J757-, up to October 2014
Fuel pressure regulating valve -N276- , up to October 2014
12Vacant
Brown
15AReversing light switch -F4-
Selector lever sensors control unit -J587-
Mechatronic unit for dual clutch gearbox -J743-
210AHigh-pressure sender -G65-
Oil level and oil temperature sender -G266-
Air conditioning system control unit -J301-
Relay for power sockets -J807-
Automatic anti-dazzle interior mirror -Y7-
16-pin connector -T16-, diagnosis connection
35AData bus diagnostic interface -J533-
45AHeater control unit -J65-
Control unit for structure-borne sound -J869-
57.5ALight switch -E1-
Starter relay 1 -J906-
Voltage stabilizer -J532-
Starter relay 2 -J907-
Relay for automatic anti-dazzle interior mirror -J910-
Front left headlight -MX1-
Front right headlight -MX2-
65ALight switch -E1-
75AABS control unit -J104-, up to October 2014
Voltage stabiliser 2 -J570-, up to October 2014
Electronically controlled damping control unit -J250-, from January 2014
85AHeated driver seat regulator -E94-
Heated front passenger seat regulator -E95-
Hazard warning lights button -E229-
Heated rear window button -E230-
TCS and ESP button -E256-
Parking aid button -E266-
Tyre pressure monitor display button -E492-
Start/Stop operation button -E693-
Trailer detector control unit -J345-
Left washer jet heater element -Z20-
Right washer jet heater element -Z21-
95APower steering control unit -J500-
1036)A
7.5 37)A
Air mass meter -G70-
Fuel pump control unit -J538-
Crankcase breather heater element -N79-
115AAirbag control unit -J234-
Front passenger airbag deactivated warning lamp -K145-
125AParking aid control unit -J446-
135AControl unit for headlight range control -J431-
1430ASeat heating control unit -J882-
1515ARear window wiper motor -V12-
165AEngine control unit -J623-
Air mass meter -G70-
Red
1Vacant
2 –Vacant
310AAll-wheel drive control unit -J492- , gradual phase-out
4Vacant
5Vacant
6Vacant
7Vacant
8Vacant
9Vacant
105A
10A
Special vehicle control unit -J608-
11Vacant
12Vacant

35) for models with 2.0 l petrol engine only
36) for models with petrol engine only
37) for models with diesel engine only

Relay/fuse holder F -SF-

No.AmpsAssignment/Designation
140AVoltage stabilizer -J532-
250ASupply
fuse carrier 1 -ST1- in fuse holder D -SD-
340ATerminal 15 voltage supply relay -J329-
440AABS control unit -J104-
55AVoltage stabiliser 2 -J570-, gradual phase-out
65AOnboard supply control unit -J519-
Voltage stabilizer -J532-
Voltage stabiliser 2 -J570-, gradual phase-out
Engine control unit -J623-
1610ABrake light switch -F- (from November 2011, up to October 2014)
Clutch position sender -G476- (from November 2011, up to November 2014)
175ALambda probe heater -Z19- (from November 2011, up to October 2014)
Lambda probe 1 heater after catalytic converter -Z29- (from November 2011, up to November 2014)

Proper maintenance of the electrical components of the Audi A1 and S1 is essential for ensuring the longevity and reliability of these vehicles. Regularly checking and replacing blown fuses and malfunctioning relays can prevent larger electrical issues from occurring. Familiarizing yourself with the location and function of the fuse box and relay diagrams can help make troubleshooting and repairs easier for both owners and mechanics alike.

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