2010 Audi A4 B8 Fuse Box Diagram
The 2010 Audi A4 (B8) has 9 fuse boxes. Choose the one you’re looking at.
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Driver's side of dash panel - carrier A (black)
Behind the cover on the driver's-side end face of the dash panel (visible with the door open; the fuse puller clips into this cover). Three colour-coded carriers stand side by side: A (black) is the right-hand one: a column of 12 MINI positions numbered 1 at the top to 12 at the bottom, with the four ATO positions 13-16 in a strip along its left edge (13 beside 1-3, 16 beside 10-12).
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | 5 AMINI | Dynamic steering control unit | |
| 2 | Not used | ||
| 3 | 5 AMINI | Garage door opener (HomeLink) | |
| 4 | Not used | ||
| 5 | 5 AMINI | Climate control | |
| 6 | 5 AMINI | Headlight range control, right | |
| 7 | 5 AMINI | Headlight range control, left | |
| 8 | 5 AMINI | Vehicle electrical system control unit 1 | |
| 9 | 5 AMINI | Adaptive cruise control | |
| 10 | 5 AMINI | Selector lever gate (automatic gearbox) | |
| 11 | 5 AMINI | Heated washer jets | |
| 12 | 5 AMINI | Climate control | |
| 13 | 5 AATO | Telephone preparation | |
| 14 | 5 AATO | Airbag control unit | |
| 15 | 25 AATO | Terminal 15 supply | |
| 16 | 40 AATO | Terminal 15 supply, engine |
Driver's side of dash panel - carrier B (brown)
Behind the cover on the driver's-side end face of the dash panel (visible with the door open; the fuse puller clips into this cover). Three colour-coded carriers stand side by side: B (brown) is the middle one, a column of 12 ATO positions numbered 1 at the top to 12 at the bottom.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | 5 AATO | Automatically dimming interior mirror | |
| 2 | 5 AATO | Clutch pedal sensor | |
| 3 | 20 AATO | Fuel pump (20 A diesel, 25 A petrol) | |
| 4 | 5 AATO | Auxiliary water pump (3.2 FSI) | |
| 5 | 15 AATO | Driver's seat heating (15 A with seat ventilation, 30 A without) | |
| 6 | 10 AATO | ESP control unit | |
| 7 | 25 AATO | Horn | |
| 8 | 30 AATO | Driver's door window motor | |
| 9 | 30 AATO | Windscreen wiper motor | |
| 10 | 25 AATO | ESP control unit | |
| 11 | 15 AATO | Driver's side door control units | |
| 12 | 5 AATO | Rain and light sensor |
Driver's side of dash panel - carrier C (red)
Behind the cover on the driver's-side end face of the dash panel (visible with the door open; the fuse puller clips into this cover). Three colour-coded carriers stand side by side: C (red) is the left-hand one, a column of 12 ATO positions numbered 1 at the top to 12 at the bottom.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | Not used | ||
| 2 | Not used | ||
| 3 | 10 AATO | Lumbar support | |
| 4 | 35 AATO | Dynamic steering | |
| 5 | 5 AATO | Climatised cupholder; antenna (Avant) | |
| 6 | 35 AATO | Vehicle electrical system control unit 1 | |
| 7 | 20 AATO | Vehicle electrical system control unit 1 | |
| 8 | 30 AATO | Vehicle electrical system control unit 1 | |
| 9 | 20 AATO | Sunroof / panorama roof | |
| 10 | 30 AATO | Vehicle electrical system control unit 1 | |
| 11 | 20 AATO | Panorama roof sun blind | |
| 12 | 5 AATO | Convenience electronics |
Passenger side of dash panel - carrier A (black)
Behind the cover on the front passenger's end face of the dash panel. Two colour-coded carriers stand side by side, A (black) on the left: a column of 12 ATO positions numbered 1 at the bottom to 12 at the top. Positions 1-4 and 9-12 are unpopulated.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | Not used | ||
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | Not used | ||
| 5 | 5 AATO | Steering column switch module | |
| 6 | 5 AATO | ESP control unit | |
| 7 | 5 AATO | Diagnostic connector (terminal 15) | |
| 8 | 5 AATO | Gateway (data bus diagnostic interface) | |
| 9 | Not used | ||
| 10 | Not used | ||
| 11 | Not used | ||
| 12 | Not used |
Passenger side of dash panel - carrier B (brown)
Behind the cover on the front passenger's end face of the dash panel. Two colour-coded carriers stand side by side, B (brown) on the right: a column of 12 ATO positions numbered 1 at the bottom to 12 at the top; a relay housing sits to its right.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | 5 AATO | CD / DVD drive | |
| 2 | 5 AATO | Audi drive select switch module | |
| 3 | 5 AATO | MMI (5 A) / radio (20 A) | |
| 4 | 5 AATO | Instrument cluster | |
| 5 | 5 AATO | Gateway (instrument cluster control unit) | |
| 6 | 5 AATO | Ignition lock | |
| 7 | 5 AATO | Rotary light switch | |
| 8 | 40 AATO | Climate control blower | |
| 9 | 5 AATO | Steering column lock | |
| 10 | 10 AATO | Climate control | |
| 11 | 10 AATO | Diagnostic connector (terminal 30) | |
| 12 | 5 AATO | Steering column switch module |
Luggage compartment - carrier B (black, ST2)
On the right-hand side of the luggage compartment behind the side trim, under the fuse cover. Five carriers stand side by side (ST1 to ST5 from the left, the special-vehicle carrier ST1 unpopulated on ordinary cars), each a column of 12 sockets numbered from the bottom up; carrier B (black) is the second from the left.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | 30 AATO | Luggage compartment lid control unit (Avant) | |
| 2 | 15 AATO | Trailer control unit | |
| 3 | 20 AATO | Trailer control unit | |
| 4 | 20 AATO | Trailer control unit | |
| 5 | 5 AATO | Electromechanical parking brake | |
| 6 | 15 AATO | Electronic damping control | |
| 7 | 30 AATO | Electromechanical parking brake | |
| 8 | 30 AATO | Vehicle electrical system control unit 2 | |
| 9 | 35 AATO | Sport differential (quattro) | |
| 10 | 30 AATO | Vehicle electrical system control unit 2 | |
| 11 | 20 AATO | Vehicle electrical system control unit 2 | |
| 12 | 5 AATO | Terminal 30 supply |
Luggage compartment - carrier C (brown, ST3)
On the right-hand side of the luggage compartment behind the side trim, under the fuse cover. Five carriers stand side by side (ST1 to ST5 from the left, the special-vehicle carrier ST1 unpopulated on ordinary cars), each a column of 12 sockets numbered from the bottom up; carrier C (brown) is the third from the left.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | 30 AATO | Luggage compartment lid control unit | |
| 2 | 15 AATO | Front passenger's seat heating and ventilation | |
| 3 | 40 AATO | DC/DC converter, path 1 | |
| 4 | 40 AATO | DC/DC converter, path 2 | |
| 5 | 30 AATO | Socket (230 V inverter) | |
| 6 | Not used | ||
| 7 | 30 AATO | Electromechanical parking brake | |
| 8 | 30 AATO | Rear seat heating | |
| 9 | 30 AATO | Passenger side door control units | |
| 10 | Not used | ||
| 11 | 15 AATO | Passenger side door control units | |
| 12 | Not used |
Luggage compartment - carrier D (red, ST4)
On the right-hand side of the luggage compartment behind the side trim, under the fuse cover. Five carriers stand side by side (ST1 to ST5 from the left, the special-vehicle carrier ST1 unpopulated on ordinary cars), each a column of 12 sockets numbered from the bottom up; carrier D (red) is the fourth from the left.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | 15 AATO | Socket, rear centre console | |
| 2 | 15 AATO | Socket, front centre console | |
| 3 | 15 AATO | Socket, luggage compartment | |
| 4 | 15 AATO | Cigarette lighter | |
| 5 | 5 AATO | Engine electronics (V6 FSI) | |
| 6 | 5 AATO | Rear seat entertainment supply | |
| 7 | 7.5 AATO | Parking aid | |
| 8 | 15 AATO | Rear window wiper (Avant) | |
| 9 | 5 AATO | Electromechanical parking brake switch | |
| 10 | 5 AATO | Audi side assist | |
| 11 | 5 AATO | Rear seat heating | |
| 12 | 5 AATO | Terminal 15 supply, control units |
Luggage compartment - carrier E (black, ST5)
On the right-hand side of the luggage compartment behind the side trim, under the fuse cover. Five carriers stand side by side (ST1 to ST5 from the left, the special-vehicle carrier ST1 unpopulated on ordinary cars), each a column of 12 sockets numbered from the bottom up; carrier E (black) is the right-hand one; the relay carrier with the heated rear window relay sits beyond it. Only positions 3-7 are populated.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | Not used | ||
| 2 | Not used | ||
| 3 | 20 AATO | Radio / DSP amplifier (20 A radio, 30 A amplifier) | |
| 4 | 7.5 AATO | MMI | |
| 5 | 7.5 AATO | Radio, navigation, telephone preparation | |
| 6 | 5 AATO | Reversing camera control unit | |
| 7 | 5 AATO | Telephone preparation | |
| 8 | Not used | ||
| 9 | Not used | ||
| 10 | Not used | ||
| 11 | Not used | ||
| 12 | Not used |