Table of Contents
The 2nd generation Audi Q3 is a premium compact crossover produced from 2018 to 2025 on the MQB modular platform. Replacing the first generation (8U), the model has become significantly larger, more technologically advanced, and features a more aggressive design. In this article, we provide a detailed breakdown of the fuse diagrams for the Audi Q3 (second generation; chassis code F3; MQB platform) for the 2019, 2020, 2021, 2022, 2023, 2024, and 2025 model years.
Below are the locations and photos of the power distribution boxes. We will specifically highlight the fuses responsible for the cigarette lighter and the fuel pump.
In the Engine Compartment
The fuse box is located next to the battery on the left side of the engine bay.
Example photo.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Rating (A) |
| 1 | ABS/ESC control module (J104) | 25 |
| 2 | ABS/ESC control module (J104), ABS hydraulic pump (V64) | 40 / 60 |
| 3 | Engine control module, ECM (J623) | 15 / 30 |
| 4 | Radiator fan (VX57), high heat output PTC heater relay (J360), low heat output PTC heater relay (J359), oil pressure control valve (N428), turbocharger bypass valve (N249), intake manifold runner control valve (N316), piston cooling jet control valve (N522), oil level and temperature sensor (G266), turbocharger switch-over valve (N529), engine component power supply relay (J757) | 5 / 7.5 / 10 |
| 5 | Fuel pressure control valve (N276), fuel metering valve (N290), engine component power supply relay (J757), turbocharger switch-over valve (N529) | 10 |
| 6 | Brake light switch, brake pedal switch (F) | 5 / 7.5 |
| 7 | Charge air cooling pump (V188), automatic transmission fluid cooling valve (N488), engine coolant shut-off valve (N82), auxiliary heater pump (V488), cylinder head coolant valve (N489), oil pressure control valve (N428), EVAP leak detection pump control module (J909) | 7.5 / 10 / 15 |
| 8 | Oxygen sensor 1 upstream of catalytic converter (GX10), oxygen sensor 1 downstream of catalytic converter (GX7), NOx sensor control module (GX30), NOx sensor 2 control module (J881) | 15 |
| 9 | Throttle valve control module (J883), exhaust flap control module (J945), glow plug control module (J179), PCV system heating element (N79), mass airflow (MAF) sensor (G70), auxiliary heater pump (V488), EVAP purge solenoid valve (N80), camshaft adjustment valves (N318, N205) | 5 / 10 |
| 10 | Fuel pump control module (J538) | 15 / 20 |
| 11 | Auxiliary PTC heater (Z35) | 40 / 50 |
| 12 | Auxiliary PTC heater (Z35) | 40 |
| 13 | Auxiliary automatic transmission fluid cooling pump (V475) | 30 |
| 14 | Heated windshield relay (J47) | 40 |
| 15 | Horn relay (J413) | 15 |
| 16 | Engine component power supply relay (J757) | 20 |
| 17 | Engine control module (J623), ABS control module (J104), heated windshield relay (J47) | 7.5 |
| 18 | Battery monitoring control module (J367), data bus diagnostic interface (Gateway) (J533) | 5 / 7.5 |
| 19 | Wiper motor control module (J400) | 30 |
| 20 | Horn (H12) | 10 |
| 21 | Heated windshield relay 2 (J611) | 30 |
| 22 | Engine control module (J623) | 5 / 7.5 |
| 23 | Starter (B) | 30 |
| 24 | Auxiliary PTC heater (Z35) | 40 |
| 31 | Engine control module | - |
| 32 | Spare | - |
| 33 | Heated windshield relay 2 (J611) | 30 |
| 34 | Heated windshield relay 2 (J611) | 30 |
| 35 | Wiper motor control module, climate control (J400) | 30 |
| 36 | Left exterior lights (parking lights) | - |
| 37 | Webasto auxiliary heater control module (J364) | 30 |
| 38 | Right exterior lights (parking lights) | - |
| Relay Assignment | |
| No. | Protected Circuits |
| R1 | Starter relay 1 (J906) |
| R2 | Starter relay 2 (J907) |
| R3 | Horn relay (J413) |
| R4 | High heat output PTC heater relay (J360) |
| R5 | Gasoline engine main relay (J271) / Terminal 30 power supply relay for diesel engine (J317) |
| R6 | Glow plug control module (J179 - gasoline/diesel) |
| R7 | Low heat output PTC heater relay (J359 - diesel) |
| R8 | Engine component power supply relay (J757 - 2.0L gasoline engine) |
| R9 | Heated windshield relay (J47) |
| R10 | Heated windshield relay 2 (J611) |
| High-Current Fusible Links (High Power Section) | ||
|---|---|---|
|
||
| No. | Description | Rating (A) |
| 1 | Terminal 30_1 power supply (main vehicle electrical system power) | 125 |
| 2 | Alternator, voltage regulator | 400 |
| 3 | Electromechanical power steering (EPS) | 80 |
| 4 | Terminal 30_1 power supply (auxiliary power) | 80 |
| 5 | Radiator fan control module | 50 / 80 |
| 6 | Heated windshield, auxiliary PTC heater | 50 |
In the Passenger Compartment
The fuse box is located under the dashboard on the driver's side.
General view.
| Diagram | |
|---|---|
|
|
| No. | Protected Circuits |
| F1 | Exhaust system (sound resonator) |
| F2 | Front seat adjustment control module |
| F4 | Multimedia system (MMI), volume control panel |
| F5 | Data bus diagnostic interface (Gateway) |
| F6 | Automatic transmission selector, ignition key withdrawal lock solenoid |
| F7 | Auxiliary heater, climate control panel, tire pressure monitoring system (TPMS) |
| F8 | Headlight range control, OEM alarm system interior monitoring sensor, ambient lighting, light switch, roof electronics control module, ERA-GLONASS module, electronic parking brake, diagnostic connector, rain and light sensor, particulate matter (PM) sensor |
| F9 | Steering column switch control module |
| F10 | Multimedia system (MMI), volume controller |
| F11 | Body control module (BCM) |
| F12 | Multimedia system (display) |
| F13 | Driver's seatbelt pretensioner igniter, supplemental restraint system (SRS) control module |
| F14 | Fresh air blower motor |
| F15 | Electronic steering column lock (ELV) module |
| F16 | Audi Phone Box module (wireless charging, signal amplifier) |
| F17 | Digital instrument cluster, emergency call module (ERA-GLONASS) |
| F18 | Rearview camera, surround view system (peripheral cameras) |
| F19 | Keyless entry and start system (KESSY) control module |
| F20 | Selective catalytic reduction (SCR) dosing system, EVAP diagnostic pump |
| F21 | Steering column switch control module |
| F24 | Body control module (BCM) |
| F25 | Driver's door control module, left rear power window, left rear door control module |
| F26 | Body control module (BCM) |
| F27 | Body control module (BCM) |
| F29 | Sunroof and roof electronics control module, body control module (BCM) |
| F30 | 48V system (Mild Hybrid), electric drive system |
| F32 | Advanced driver-assistance systems (ADAS) modules, assistant cameras |
| F33 | Front passenger seat control module, roof electronics control module |
| F34 | A/C compressor clutch, electronic parking brake, reversing lights, structure-borne sound actuator (Soundaktor) |
| F35 | Air quality sensor, diagnostic connector, center console button panel, auto-dimming interior rearview mirror, headlight range control, instrument lighting |
| F39 | Passenger door control module, right rear power window, right rear door control module |
| F40 | 12V socket, cigarette lighter |
| F41 | Passenger seatbelt pretensioner igniter |
| F42 | Body control module (BCM - central locking) |
| F44 | All-wheel drive clutch control module (Haldex) |
| F45 | Driver's power seat control module |
| F47 | Rear window wiper motor |
| F48 | Cabin structure-borne sound actuator (Soundaktor) |
| F49 | Starter relay, clutch pedal position sensor, 48V system (Mild Hybrid) |
| F52 | Adaptive chassis control (DCC) module |
| F53 | Rear window defogger element |
| A | Front right seat adjustment control module (EX34), front right seat cushion (V518) and backrest (V516) fans |
| B | Remote start system relay (J471) |
| C | USB charging port (U37) |
| Relay Description | |
| No. | Protected Circuits |
| R1 (var. 1) | Remote start system relay (J471) |
| R1 (var. 2) | SCR reducing agent dosing system relay (J963) |
| R2 | A/C compressor electromagnetic clutch relay |
| R3 | Spare |
| R4 | Terminal 15 power supply relay (J329) |
| R5 | Rear window defogger relay (J9) |
| R6 | 12V sockets relay (J807) |
