Audi A3 2009 Fuse Box Info
Passenger compartment fuse box location:
The instrument panel fuse box is located on the end of the instrument panel on the driver’s side of the vehicle.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 10A | Manual headlight beam adjustment, automatic headlight beam adjustment, AFS control module, engine components, light switch (switch lighting/illumination), diagnosis socket |
| 2 | 10A | Automatic transmission, control module for CAN data transfer (gateway), electro -mechanical steering, shift gate automatic transmission engine relay, fuel tank control unit, engine control unit, brakes control (ABS), Electronic Stabilization Program (ESP), Anti-Slip Regulation (ASR), brake light switch |
| 3 | 5A | Airbag |
| 4 | 5A | Air-conditioning (pressure sensor, air quality sensor), button for Electronic Stabilization Program (ESP), Anti-Slip Regulation (ASRI), tire pressure monitor dysplay, oil level sensor, back-up light switch, front seat heating, parking aid, seat-occupancy recognition (on USA vehicles), navigation, garage door opener, automatic mirror dimming, heated windshield washer nozzles, air conditioning (control module) |
| 5 | 5A | AFS headlights (left side) |
| 6 | 5A | AFS headlights (right side) |
| 7 | - | Not used |
| 8 | - | Not used |
| 9 | - | Not used |
| 10 | - | Not used |
| 11 | - | Not used |
| 12 | 10A | Central locking (front doors) |
| 13 | 10A | Central locking |
| 14 | 10A | Electronic Stabilization Program (ESP) (control module), shift gate automatic transmission |
| 15 | 10A | Interior lights, reading lights |
| 16 | 10A | Diagnostic connector, rain sensor, air conditioning (control module), tire pressure monitor display (control module) |
| 17 | 5A | Anti-theft alarm warning system |
| 18 | 5A | Terminal 15 |
| 19 | 10A | All Wheel Drive |
| 20 | 5A | Magnetic ride |
| 21 | - | Not used |
| 22 | 40A | Air conditioning (blower fan) |
| 23 | 30A | Driver's side power window, front |
| 24 | 20A | Power outlet front |
| 25 | 30A | Rear window defogger |
| 26 | 20A | Power outlet in luggage compartment |
| 27 | 15A | Fuel tank control module, fuel pump |
| 28 | 30A | Power window, rear |
| 29 | - | Not used |
| 30 | - | Not used |
| 31 | 20A | Automatic transmission (vacuum pump) |
| 32 | 30A | Headlight washer system |
| 33 | 20A | Sliding/pop-up roof |
| 34 | - | Not used |
| 35 | - | Not used |
| 36 | 10A | Lumbar support |
| 37 | 20A | Heated seats, front |
| 38 | 30A | Passenger side power window, front |
| 39 | 5A | Special function interface |
| 40 | 40A | Starter |
| 41 | 15A | Rear window wiper |
| 42 | 15A | Windshield wiper (washer pump) |
| 43 | 20A | Convenience electronics (control module) |
| 44 | 20A | Trailer control module |
| 45 | 15A | Trailer control module |
| 46 | - | Not used |
| 47 | 5A | Cell phone package (VDA interface) |
| 48 | - | Not used |
| 49 | - | Not used |
Engine compartment fuse box (Version with 30 Plugin fuses):
| Fuse/Relay N° | Rating | Functions |
| 1 | - | Not used |
| 2 | 5A | Transmission control module |
| 3 | 5A | Battery voltage |
| 4 | 20/30A | ESP valve, Anti-lock brake system (ABS) valves |
| 5 | 15A | Transmission control module |
| 6 | 5A | Steeling wheel electronics |
| 7 | 30A | Transmission control module |
| 8 | 15/25A | Navigation system, radio system |
| 9 | 5A | Navigation system, digital radio, cell phone, TV equipment |
| 10 | 5/10A | Engine control module, main relay |
| 11 | - | Not used |
| 12 | 5A | Control module for CAN data transfer (gateway) |
| 13 | 15/25A | Engine control module |
| 14 | 20A | Ignition coils |
| 15 | 5/10A | Tank diagnosis, oxygen sensor |
| 16 | 30A | Vehicle electrical system control unit (right) |
| 17 | 15A | Horn |
| 18 | 30A | Audio amplifier |
| 19 | 30A | Front windshield wiper system |
| 20 | 10/20A | Water return-flow pump, volume regulator valve |
| 21 | 10A | Oxygen sensor, vacuum pump |
| 22 | 5A | Clutch pedal switch, brake light switch |
| 23 | 5/10/15A | Engine relays, engine components |
| 24 | 10A | Engine components, water return-flow pump |
| 25 | 30/40A | Pump (ESP/ABS), ABS valve |
| 26 | 30A | Vehicle electrical system control unit (left) |
| 27 | 40A | Secondary air pump |
| 28 | - | Not used |
| 29 | 50A | Fuse assignment in the left-side instrument panel (special equipment) |
| 30 | 50A | Power supply relay terminal 15 |
Engine compartment fuse box (Version with 54 Plugin fuses):
| Fuse/Relay N° | Rating | Functions |
| 1 | 30A | Vehicle electrical system control unit (right) |
| 2 | 20/30A | ESP valves, Anti-lock brake system (ABS) valves |
| 3 | - | Not used |
| 4 | 5A | Battery voltage |
| 5 | 15A | Horn |
| 6 | 15A | Engine components, fuel pump |
| 7 | - | Not used |
| 8 | - | Not used |
| 9 | 10A | Engine components |
| 10 | 10A | Fuel tank control, mass air flow sensor |
| 11 | 10A | Oxygen sensors, in front of catalytic converter |
| 12 | 10A | Oxygen sensors, behind catalytic converter |
| 13 | 15A | Automatic transmission |
| 14 | - | Not used |
| 15 | 10A | Water return-flow pump |
| 16 | 20A | Volume control valve |
| 17 | 5A | Steering wheel electronics |
| 18 | 30A | Audio amplifier |
| 19 | 15/25A | Navigation system, radio system |
| 20 | 5A | Navigation system, digital radio, cell phone, TV equipment |
| 21 | - | Not used |
| 22 | - | Not used |
| 23 | 10A | Engine control module, main relay |
| 24 | 5A | Control module for CAN data transfer (gateway) |
| 25 | - | Not used |
| 26 | - | Not used |
| 27 | - | Not used |
| 28 | 15/25A | Engine control module |
| 29 | 5A | Engine relays, engine components |
| 30 | - | Not used |
| 31 | 30A | Front windshield wiper system |
| 32 | - | Not used |
| 33 | - | Not used |
| 34 | - | Not used |
| 35 | - | Not used |
| 36 | - | Not used |
| 37 | - | Not used |
| 38 | 10A | Engine components, tank diagnosis |
| 39 | 5A | Clutch pedal switch, brake light switch |
| 40 | 20A | Ignition coils |
| 41 | - | Not used |
| 42 | - | Not used |
| 43 | 30A | Ignition coils |
| 44 | - | Not used |
| 45 | - | Not used |
| 46 | - | Not used |
| 47 | 30A | Left-side lighting (electric system control unit) |
| 48 | 30A | Right-side lighting (electric system control unit) |
| 49 | - | Not used |
| 50 | - | Not used |
| 51 | 40A | Secondary air pump |
| 52 | 50A | Power supply relay terminal 15 |
| 53 | 50A | Fuse assignment in the left-side instrument panel (special equipment) |
| 54 | - | Not used |
