The Audi A6 C8 represents the fifth generation of the Audi A6 model series, produced in 2018, 2019, 2020, 2021, 2022, 2023, and 2024 under the Type 4K designation. This article provides a description of the Audi A6 C8 fuses and relays, including block diagrams, their locations, and sample photos. We’ll focus on the fuse responsible for the cigarette lighter socket (USB ports).
The purpose of the fuses and relays may differ from that shown in the diagram and depends on the year of manufacture and the vehicle’s electrical equipment.
Audi A6 C8 fuse box in the passenger compartment
At the left end of the dashboard, behind the protective cover, is the fuse box.
Description
| Fuse panel A (black) | |
| A2 | Steering column adjustment |
| A3 | CD/DVD player |
| A4 | Steering column electronics |
| A5 | Light switches, control panels |
| A6 | Volume control |
| A7 | control panel |
| A8 | MMI display front (top/bottom) |
| A9 | Heated steering wheel |
| Fuse box B (brown) | |
| B2 | MMI infotainment control module |
| B3 | Audi Music Interface , USB port |
| B4 | Windshield |
| B5 | Air conditioning system, aromatization system, ionizer |
| B9 | Steering column lock |
Fuse box in the footwell
To access the device, you must remove the protective cover (right-hand drive models). Use a flat-blade screwdriver to remove the cover from the mounting screw, then loosen the screw and remove the cover (left-hand drive models).
Designation
| Fuse panel A (black) | |
| A1 | 2018–2019: Unused; |
| 2020–2023: Heated catalytic converter | |
| A2 | Engine components |
| A3 | Engine components |
| A4 | Engine components |
| A5 | Brake light sensor |
| A6 | 2018-2019: Engine components; |
| 2020-2024: Engine valves, camshaft adjustment | |
| A7 | Engine components |
| A8 | Engine components |
| A9 | 2018–2020: Engine Components |
| 2021–2024: Engine components, 48V water pump, 48V geared generator | |
| A10 | Oil pressure sensor, oil temperature sensor |
| A11 | 2018-2019: Engine start; |
| 2020 – 2024: Engine components, 48V water pump, 48V geared generator, 12V geared generator | |
| A12 | Engine components, engine valves, engine assembly |
| A13 | Radiator fan |
| A14 | 2018-2019: Engine control module; |
| 2020–2024: Engine control module, injectors | |
| A15 | 2018–2020: Engine Sensors |
| 2021-2024: Engine sensors, ignition coils, lambda sensors | |
| A16 | fuel pump |
| Fuse box B (red) | |
| B1 | Anti-theft alarm |
| B2 | Engine control module |
| B3 | Left anterior lumbar support |
| B5 | Siren |
| B6 | parking brake |
| B7 | Gateway control module (diagnostics) |
| B8 | 2018-2019: Upholstery lighting; |
| 2020-2024: Roof electronics control module | |
| B9 | Driver Assistance Control Module |
| B10 | Airbag control module |
| B11 | Electronic Stability Control (ESC), Anti-lock Braking System (ABS) |
| B12 | Light/rain sensor diagnostic connector |
| B13 | Climate control system |
| B14 | Front right door control module |
| B15 | Air conditioning compressor, body electronics |
| B16 | Auxiliary accumulator control module, brake pressure reservoir |
| Fuse box C (red) | |
| C1 | Engine ignition coils |
| C3 | 2018–2019: Unused; |
| 2020-2024: High voltage heater, compressor | |
| C5 | Engine mount |
| C6 | Automatic transfer |
| C7 | panel |
| C8 | Fresh air blower for air conditioning |
| C9 | Windshield wiper control module |
| F10 | Dynamic steering system |
| C11 | The engine starts |
| C12 | 2018–2019: Unused; |
| 2020: Automatic transmission | |
| 2021–2024: Automatic transmission oil pump | |
| Fuse box D (black) | |
| D1 | Heated front seats |
| D2 | Windshield wipers |
| D3 | Left headlight electronics |
| D4 | Panoramic glass roof |
| D5 | Left front door control module |
| D6 | nests |
| D7 | Rear right door control module |
| D8 | All-wheel drive control module (quattro) |
| D9 | Right headlight electronics |
| D10 | Windshield washer/headlight washer |
| D11 | Rear left door control module |
| D12 | Additional heating |
| Fuse panel E (brown) | |
| E1 | 2018-2019: Seat ventilation, seat heating, rearview mirror, air conditioning, rear air conditioning controls; |
| 2020–2024: Seat ventilation, seat electronics, rearview mirror, rear climate control module, diagnostic connector, traffic information antenna (TMC) | |
| E2 | 2018-2019: Air conditioning system; |
| 2020–2024: Vehicle Electrical Control Module, Gateway Control Module | |
| E3 | Drive/exhaust noise adjustment |
| E4 | Gearbox heater valve |
| E5 | The engine starts |
| E7 | Active accelerator pedal |
| E8 | Night vision system, active roll stabilization |
| E9 | Adaptive cruise control assistant, front radar |
| E11 | Crossroad assistant, driver assistance systems |
In addition to the device, other fuses and relays may also be installed, e.g. seat and steering column adjustment controller with memory settings, etc.
Fuse box in the trunk
In the trunk, near the left seat backrest, under the protective cover, there is another block with fuses and relays.
| Fuse panel A (black) | |
| A1 | 2021-2022: Thermal Management |
| A3 | Rear seat belt pretensioner, passenger side |
| A4 | Driver’s side rear seat belt pretensioner |
| A5 | Air suspension |
| A6 | Automatic transfer |
| A7 | Rear sunroof, rear spoiler |
| A8 | Heated rear seats |
| A9 | 2018-2019: central locking, rear lights; |
| 2020: Left rear light | |
| 2021-2024: Comfort system control module, left rear light | |
| A10 | Driver’s side front seat belt pretensioner |
| A11 | 2018-2019: central locking, rear roller blind; |
| 2020: Central locking of the trunk lid, fuel filler flap, trunk lid | |
| 2021–2024: Central locking trunk lid, fuel filler flap, sun visor, trunk lid | |
| A12 | Tailgate control module |
| Fuse box B (red) | |
| B1 | 2018–2019: Unused; |
| 2020: Suspension Stabilizer Control Module | |
| B2 | 2018–2019: Unused; |
| 2020: Service switch | |
| B4 | 2018–2019: Unused; |
| 2020: Electric motor | |
| 2021-2024: Electric drive system, power electronics | |
| B5 | 2018-2020: Braking system |
| 2021-2024: Braking system, brake booster | |
| B6 | 2018–2019: Unused; |
| 2020–2022: High-voltage battery-powered water pump | |
| B7 | 2018–2019: Unused; |
| 2020: Hybrid interior air conditioning with remote control | |
| 2021: Power assisted air conditioning | |
| B8 | 2018–2019: Unused; |
| 2020: Hybrid Air Conditioning Compressor | |
| 2021-2022: Air conditioning compressor | |
| B9 | Auxiliary battery control module |
| B10 | 2018–2019: Unused; |
| 2020-2024: High-voltage hybrid battery | |
| B11 | 2018–2019: Unused; |
| 2020–2024: Hybrid Charger | |
| B14 | 2018–2019: Unused; |
| 2020-2024: Thermostat, water pump | |
| B15 | 2018–2019: Unused; |
| 2020-2024: Thermal Control Module | |
| B16 | 2018–2019: Unused; |
| 2020: Goal | |
| Fuse panel C (brown) | |
| C1 | Driver Assistance Control Module |
| C2 | 2018-2020: Audi phone booth, roof antenna |
| 2021-2024: Audi telephone unit | |
| C3 | 2018-2019: Right front lumbar support; |
| 2020-2021: Electronic front seats, lumbar support on the right side | |
| 2022: Right lumbar support | |
| C4 | Side Assistance |
| C5 | 2018–2019: Unused; |
| 2020-2021: Rear air conditioning control panel | |
| 2022: Remote rear seat controls | |
| C6 | Tire pressure monitoring system |
| C7 | Emergency call system |
| C8 | 2018–2019: Unused; |
| 2020-2024: Radio with parking heater, fuel tank monitoring | |
| C9 | Automatic transmission gear shift lever |
| F10 | TV tuner, data exchange and telematics control module |
| C11 | Open/start car (NFC) |
| C12 | Open the garage door |
| C13 | Reversing camera, peripheral cameras |
| C14 | Central locking, rear lights |
| C16 | Front seat belt pretensioner, passenger side |
| Fuse box D (black) | |
| D1-D16 | Not assigned |
| Fuse box E (red) | |
| E2 | 2021-2022: External antenna |
| E3 | Exhaust system, sound drive, air conditioning outlet |
| E4 | Rear air conditioning control panel |
| E5 | Right trailer hitch light, right rear seat adjustment |
| E7 | trailer hitch |
| E8 | Left trailer hitch light, right rear seat adjustment |
| E9 | Trailer hitch, high voltage battery |
| E10 | All-wheel drive, sport differential |
| E11 | Exhaust gas purification |
| E12 | 48V generator |
Additional articles
Description
- A – 15A Front passenger seat adjustment with memory controller (right-hand drive)
- B –
- C – 30A relay for heated rear window
- D – 40A Adaptive suspension compressor electronics
- E-
- F –
A heavy-duty fuse box can be mounted near the battery.
Photo – example
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