Audi Q8 fuse box diagram for 2019, 2020, 2021, 2022, 2023, 2024 and 2025 models. Complete fuse locations and assignments for the dashboard, driver’s footwell and luggage compartment, including fuel pump, USB, 12V sockets, MMI, headlights and climate control.
The Audi Q8 has been produced since 2018 and uses several fuse panels located throughout the vehicle.
This guide covers the Audi Q8 2019, 2020, 2021, 2022, 2023, 2024 and 2025 model years.
The location and assignment of individual fuses can vary depending on the production year, engine, market and optional equipment.
The main fuse locations are:
- left side of the dashboard;
- driver’s footwell;
- left side of the luggage compartment.
Audi Q8 Fuse Box Locations
Location 1 – Left Side of Dashboard
Open the driver’s door.
Remove the plastic cover located on the left end of the dashboard.
Behind it you will find the cockpit fuse panel.
Simplified fuse layout
AUDI Q8 – LEFT DASHBOARD FUSE PANEL
┌─────────────────────────────────────┐
│ A1 A2 A3 A4 A5 A6 A7 │
│ │
│ A8 A9 A10 A11 A12 A13 A14 │
│ │
│ A15 A16 │
└─────────────────────────────────────┘
Dashboard Fuse Assignment – 2019–2022
| Fuse | Protected component |
|---|---|
| A1 | Not assigned |
| A2 | Audi phone box / roof antenna |
| A3 | Climate control system, fragrance system; ionizer on some early versions |
| A4 | Head-up display |
| A5 | Audi music interface / USB sockets |
| A6 | Not assigned |
| A7 | Steering column lock |
| A8 | Upper and lower displays |
| A9 | Instrument cluster |
| A10 | CD/DVD player |
| A11 | Light switch / switch panels |
| A12 | Steering column electronics |
| A13 | Volume control |
| A14 | MMI infotainment control module |
| A15 | Steering column adjustment |
| A16 | Steering wheel heating |
Therefore, if the Audi Q8 MMI display, USB connection, instrument cluster or heated steering wheel stops working, this is one of the first fuse panels worth checking.
Audi Q8 Driver’s Footwell Fuse Box
The largest group of fuses is located in the driver’s footwell.
There are several separate fuse carriers identified by letters.
AUDI Q8 – DRIVER'S FOOTWELL
┌─────────────┐
│ PANEL A │ Brown
└─────────────┘
┌─────────────┐
│ PANEL B │ Red
└─────────────┘
┌─────────────┐
│ PANEL C │ Black
└─────────────┘
┌─────────────┐
│ PANEL D │ Brown
└─────────────┘
┌─────────────┐
│ PANEL E │ Red
└─────────────┘
Fuse Panel A – Brown
This panel contains many engine-management circuits.
| Fuse | 2019–2021 | 2022 |
|---|---|---|
| A1 | Not used / engine-dependent | Catalytic converter heating, camshaft adjustment |
| A2 | Engine components | Mass airflow sensor, heated oxygen sensors |
| A3 | Engine components | Engine heating, fuel injectors, exhaust doors |
| A4 | Engine components | Hot-water pump, exhaust doors, NOx sensor, particulate sensor |
| A5 | Brake light sensor | Brake light sensor |
| A6 | Engine components | Engine valves |
| A7 | Engine components | Heated oxygen sensor, mass airflow sensor |
| A8 | Engine components | High-pressure pump, engine mount |
| A9 | Engine components | Engine components / engine relay |
| A10 | Oil pressure and oil temperature sensors | Oil pressure and oil temperature sensors |
| A11 | Engine start / engine components | 48V coolant pump, starter-generator systems |
| A12 | Engine components | Engine valves |
| A13 | Engine cooling | Engine cooling |
| A14 | Engine control module | Engine control module |
| A15 | Engine sensors | Heated oxygen sensors |
| A16 | Fuel pump | Fuel pump |
Audi Q8 Fuel Pump Fuse
One of the most frequently searched fuses is the fuel-pump fuse.
For the 2019–2022 layout:
Fuse A16 – Fuel Pump
It is located in the brown fuse carrier in the driver’s footwell.
If the engine cranks but refuses to start, A16 is one of the fuses worth checking.
Fuse Panel B – Red
PANEL B
B1 B2 B3 B4
B5 B6 B7 B8
B9 B10 B11
| Fuse | Assignment |
|---|---|
| B1 | Ignition coils |
| B2 | Not assigned / equipment dependent |
| B3 | High-voltage heating on applicable versions |
| B4 | Electric compressor on applicable versions |
| B5 | Engine mount |
| B6 | Windshield washer system control module |
| B7 | Instrument panel |
| B8 | Climate-control fresh-air blower |
| B9 | Driver-assistance systems control module |
| B10 | Emergency call system |
| B11 | Engine start / electric-drive related equipment depending on year |
Fuse Panel C – Black
This panel contains several important comfort and body-electrical circuits.
| Fuse | Assignment |
|---|---|
| C1 | Front seat heating |
| C2 | Windshield wipers |
| C3 | Left headlight electronics |
| C4 | Panoramic glass roof |
| C5 | Left front door control module |
| C6 | 12V power sockets |
| C7 | Right rear door control module |
| C8 | Not assigned |
| C9 | Right headlight electronics |
| C10 | Windshield/headlight washer system |
| C11 | Left rear door control module |
| C12 | Parking heater |
Audi Q8 Cigarette Lighter / 12V Socket Fuse
For this fuse layout, the important position is:
Fuse C6 – Power sockets
If the 12V socket or cigarette lighter socket does not work, check C6 in the driver’s footwell fuse panel.
Remember that equipment can differ between production years, so verify the assignment for your particular vehicle before replacement.
Fuse Panel D – Brown
| Fuse | Assignment |
|---|---|
| D1 | Seat ventilation, seat electronics, rear-view mirror, rear climate controls, diagnostic connection |
| D2 | Vehicle electrical system / gateway control module |
| D3 | Sound generator |
| D4 | Transmission fluid cooling valve |
| D5 | Engine start |
| D6 | Not assigned |
| D7 | Not assigned |
| D8 | Night vision assist / active roll stabilization depending on year |
| D9 | Adaptive cruise assist / front sensors |
| D10 | Exterior sound generator on applicable models |
| D11 | Intersection assistant / driver-assistance systems |
| D12 | Not assigned |
| D13 | Left headlight |
| D14 | Audi music interface / equipment dependent |
| D15 | USB input on applicable models |
Audi Q8 USB Fuse
USB equipment can be protected by different circuits depending on year and specification.
Important positions include:
Dashboard A5 – Audi Music Interface / USB
and on certain versions:
D15 – USB input
If the USB port stops working, first test another cable and device before replacing a fuse.
Fuse Panel E – Red
| Fuse | Assignment |
|---|---|
| E1 | Anti-theft alarm system |
| E2 | Engine control module |
| E3 | Front seat electronics / lumbar support |
| E4 | Automatic transmission selector lever |
| E5 | Horn |
| E6 | Parking brake |
| E7 | Gateway control module / diagnostics |
| E8 | Roof electronics / interior roof lighting depending on year |
| E9 | Drivetrain generator on applicable models |
| E10 | Airbag control module |
| E11 | ESC / ABS |
| E12 | Diagnostic connector / light and rain sensor |
| E13 | Climate-control system |
| E14 | Right front door control module |
| E15 | Climate-control compressor |
| E16 | Brake-system pressure reservoir on applicable 2022 versions |
Audi Q8 Luggage Compartment Fuse Box
The third major fuse location is in the luggage compartment.
Open the luggage compartment and look behind the trim on the left-hand side.
The rear electrical panel contains several fuse carriers.
AUDI Q8 – LUGGAGE COMPARTMENT
┌──────────┐
│ PANEL A │ BLACK
└──────────┘
┌──────────┐
│ PANEL B │ RED
└──────────┘
┌──────────┐
│ PANEL C │ BROWN
└──────────┘
┌──────────┐
│ PANEL D │ RED
└──────────┘
┌──────────┐
│ PANEL E │ BROWN
└──────────┘
Rear Fuse Panel A – Black
| Fuse | Assignment |
|---|---|
| A1 | High-voltage heating / thermal management on applicable versions |
| A2 | Not assigned |
| A3 | Not assigned |
| A4 | Not assigned |
| A5 | Air suspension / damping |
| A6 | Automatic transmission |
| A7 | Rear seat heating / rear climate-control panel |
| A8 | Not assigned |
| A9 | Central locking / left tail light |
| A10 | Driver-side front seat-belt tensioner |
| A11 | Tailgate central locking, fuel filler door, luggage cover depending on year |
| A12 | Luggage compartment lid control module |
Audi Q8 Power Tailgate Fuse
For the 2019–2022 configuration, check:
A12 – Luggage compartment lid control module
If the tailgate stops opening electrically, the fuse is only one possible cause. The switches, wiring, drive mechanism and control module should also be considered.
Rear Fuse Panel B – Red
| Fuse | Assignment |
|---|---|
| B1 | Rear climate-control blower |
| B2 | Sound amplifier |
| B3 | Exhaust treatment / sound actuator |
| B4 | Rear climate-control panel |
| B5 | Right trailer-hitch light |
| B6 | Trailer-hitch positioning motor |
| B7 | Trailer-hitch release |
| B8 | Left trailer-hitch light |
| B9 | Trailer socket |
| B10 | Sport differential |
| B11 | Exhaust treatment |
| B12 | Driver-side rear seat-belt tensioner |
Rear Fuse Panel C – Brown
| Fuse | Assignment |
|---|---|
| C1 | Driver-assistance systems control module |
| C2 | Audi phone box |
| C3 | Front seat electronics / right lumbar support |
| C4 | Side Assist |
| C5 | Not assigned |
| C6 | Tire-pressure monitoring system |
| C7 | Exterior antenna on applicable models |
| C8 | Auxiliary heater receiver / fuel-tank monitoring |
| C9 | Not assigned |
| C10 | TV tuner / telematics and data-exchange control module |
| C11 | Convenience access and start authorization |
| C12 | Garage-door opener |
| C13 | Rear-view camera / peripheral cameras |
| C14 | Convenience system / right tail light |
| C15 | Passenger-side rear seat-belt tensioner |
| C16 | Front passenger seat-belt tensioner |
Rear Fuse Panel D – Red
This panel varies considerably depending on the powertrain.
| Fuse | Assignment |
|---|---|
| D1 | Active roll stabilization on applicable versions |
| D2 | High-voltage battery – selected 2022 versions |
| D3 | High-voltage battery coolant pump |
| D4 | Power electronics control module |
| D5 | Brake system / brake booster depending on year |
| D6 | Voltage converter |
| D7 | Engine start on applicable versions |
| D8 | Climate-control compressor |
| D9 | Auxiliary battery control module |
| D10 | High-voltage battery |
| D11 | Charging system |
| D12 | Auxiliary heating/air-conditioning receiver |
| D13 | Not assigned |
| D14 | Thermal management / coolant pumps |
| D15 | Thermal-management control module |
This section is particularly dependent on whether the Q8 uses conventional, mild-hybrid, plug-in-hybrid or other electrified equipment.
Rear Fuse Panel E – Brown
Depending on model year and equipment, this smaller panel can include:
| Fuse | Assignment |
|---|---|
| E7 | Front seat heating |
| E9 | Exhaust treatment |
| E10 | Rear seat heating / rear climate controls |
| E12 | Exhaust treatment |
Unused positions are not necessarily a fault. Audi does not install every fuse in every Q8.
Audi Q8 Fuse Box by Model Year
Audi Q8 2019
The 2019 Q8 uses the early first-generation fuse arrangement.
Important positions include:
- A16 – fuel pump;
- C6 – power sockets;
- C1 – front seat heating;
- C2 – windshield wipers;
- A14 dashboard – MMI;
- A16 dashboard – steering wheel heating.
Audi Q8 2020
The basic fuse-box locations remain similar, but some assignments changed because of different engines and electrical equipment.
High-voltage and thermal-management equipment also appears on applicable versions.
Audi Q8 2021
The 2021 owner’s manual identifies three primary fuse locations:
left side of cockpit → driver’s footwell → left side of luggage compartment.
The footwell contains several color-coded carriers, while the luggage compartment contains additional carriers for rear electronics, air suspension, trailer equipment, cameras and convenience systems.
Audi Q8 2022
The 2022 layout includes additional assignments associated with:
- 48V electrical equipment;
- starter-generator;
- high-voltage battery equipment on applicable versions;
- thermal management;
- electric compressor;
- charging equipment.
This means a 2022 Q8 should not automatically be diagnosed using a 2019 engine-related fuse assignment.
Audi Q8 2023
For 2023, the overall concept remains similar, but several individual fuse assignments differ from earlier vehicles.
Use the 2023-specific diagram when diagnosing engine, hybrid or electronic equipment.
Audi Q8 2024
The Q8 received a facelift for the 2024 model year.
Because equipment and electronics changed, owners of facelift vehicles should use the 2024-specific fuse assignment rather than assuming every 2019–2022 position remains identical.
Audi Q8 2025
The same warning applies to the 2025 Q8.
The physical fuse-box areas remain broadly similar, but individual positions depend on:
- engine;
- market;
- equipment;
- optional systems;
- electrification level.
Audi Q8 Relay Locations
The Audi Q8 differs from many older vehicles because not every electrical consumer uses a conventional removable relay.
Many functions are switched by electronic control modules and power-management electronics.
Relays and power-control equipment can be associated with systems including:
- engine starting;
- engine management;
- fuel system;
- heating;
- cooling;
- power supply;
- high-current electrical consumers.
Therefore, there is no single universal “Audi Q8 relay box” containing a removable relay for every system.
Always identify the circuit before replacing a relay.
Fuse Color and Amperage
Audi uses color coding to make fuse identification easier.
| Fuse color | Rating |
|---|---|
| Black | 1A |
| Gray | 2A |
| Purple | 3A |
| Pink | 4A |
| Light brown | 5A |
| Brown | 7.5A |
| Red | 10A |
| Light blue | 15A |
| Yellow | 20A |
| White / transparent | 25A |
| Light green | 30A |
| Teal | 35A |
| Orange | 40A |
Always replace a blown fuse with another fuse of the same amperage.
Never replace a 15A fuse with a 20A or 30A fuse simply because the 15A fuse keeps blowing.
Most Important Audi Q8 Fuses
For quick reference:
| Component | Fuse / location |
|---|---|
| Fuel pump | Footwell A16 |
| 12V sockets / cigarette lighter | Footwell C6 |
| MMI infotainment | Dashboard A14 |
| USB / Audi Music Interface | Dashboard A5 / selected versions D15 |
| Steering wheel heating | Dashboard A16 |
| Instrument cluster | Dashboard A9 |
| Front seat heating | Footwell C1 |
| Windshield wipers | Footwell C2 |
| Left headlight electronics | Footwell C3 |
| Right headlight electronics | Footwell C9 |
| Panoramic roof | Footwell C4 |
| Horn | Footwell E5 |
| Parking brake | Footwell E6 |
| Airbag module | Footwell E10 |
| ABS / ESC | Footwell E11 |
| Climate control | Footwell E13 |
| Power tailgate module | Rear A12 |
| Sound amplifier | Rear B2 |
| Tire pressure monitoring | Rear C6 |
| Rear-view / peripheral cameras | Rear C13 |
How to Replace a Fuse
- Park the vehicle safely.
- Switch off the ignition.
- Switch off all electrical equipment.
- Locate the appropriate fuse panel.
- Identify the fuse.
- Remove it using the fuse puller.
- Check whether the internal metal strip has broken.
- Install a fuse with exactly the same amperage.
- Test the electrical component.
If the new fuse blows again shortly after installation, the electrical system should be diagnosed.
Do not continue installing replacement fuses.
Frequently Asked Questions
Where are the fuses in an Audi Q8?
The main fuse panels are located on the left side of the dashboard, in the driver’s footwell and on the left side of the luggage compartment.
Which fuse is for the Audi Q8 cigarette lighter?
On the 2019–2022 layout, C6 in the driver’s footwell black fuse carrier protects the power sockets. Always verify the assignment for the specific model year.
Which fuse is for the Audi Q8 fuel pump?
On the 2019–2022 layout, the fuel pump is assigned to A16 in the brown driver’s-footwell fuse carrier.
Where is the Audi Q8 MMI fuse?
The MMI infotainment control module is associated with A14 in the left dashboard fuse panel on the 2019–2022 layout.
Which fuse controls the Audi Q8 USB ports?
The Audi Music Interface/USB circuit is associated with A5 in the dashboard fuse panel, while some versions also have a USB-related circuit at D15.
Where is the Audi Q8 tailgate fuse?
The luggage-compartment lid control module is associated with A12 in the rear fuse panel on the applicable 2019–2022 layout.
Are all Audi Q8 fuse diagrams the same?
No.
Fuse assignments can change according to the model year, engine, market and optional equipment. This is particularly important for hybrid, 48V and facelift models.
Conclusion
The Audi Q8 fuse and relay system is divided between several locations rather than one central fuse box.
For 2019–2022 vehicles, the three main areas are the left dashboard, driver’s footwell and left side of the luggage compartment.
Important commonly searched positions include A16 for the fuel pump, C6 for power sockets, A14 for the MMI system, A5 for USB/Audi Music Interface and rear A12 for the luggage-compartment lid control module.
For 2023, 2024 and 2025 Audi Q8 models, always compare the fuse assignment with the diagram for the exact model year because some circuits and powertrain-related assignments differ from earlier vehicles.
If a replacement fuse blows again, do not install a higher-rated fuse. Diagnose the circuit for a short circuit, damaged wiring or defective electrical component.