The Audi A3 is a compact family hatchback produced by the German manufacturer since 1996. In 2000, the model received a facelift. In this article, we will provide a detailed overview of the fuse box diagrams for the first-generation Audi A3 (8L), covering the production years 1996, 1997, 1998, 1999, 2000, 2001, 2002, and 2003.
Here you will find the locations and photos of the fuse and relay boxes. The fuses for the “Cigarette lighter” and “Fuel pump” are highlighted in bold.
Engine Compartment
There are two fuse boxes located in the engine compartment:
- No. 1 - High-power fuse box on the battery terminal,
- No. 2 - Auxiliary fuse and relay box.
High-Power Fuses
General overview.
| Diagram | |
|---|---|
|
|
| No. | Function |
| 1 | Various components |
| 2 | Glow plug heater (diesel engines) |
| 3 | Engine management system |
| 4 | Radiator cooling fan 2 |
| 5 | Interior equipment |
| 6 | Alternator |
| 1a | ABS hydraulic pump |
| 2a | ABS valves |
| 3a | Radiator cooling fan |
Auxiliary Fuse Box
Description of the auxiliary underhood fuse and relay box (No. 2 in the diagram)
General overview.
| Diagram | |||
|---|---|---|---|
|
|||
| No. | Function | ||
| 1 | Secondary air injection (SAI) pump relay | ||
| 2 | Engine Control Module (ECM) relay | ||
| 3 | Brake booster vacuum pump | 20A | |
| 4 | Secondary air injection (SAI) pump | 40A | |
Passenger Compartment
Interior Fuse Box
Located on the edge of the dashboard on the driver's side. To access it, carefully pry off the side trim panel with a flathead screwdriver and remove it.
The photo provides an example.
| Diagram | ||
|---|---|---|
|
||
| No. | Function | A |
| 1 | Heated windshield washer nozzles, heated exterior mirrors | 10 |
| 2 | Turn signal indicators | 10 |
| 3 | Glove compartment illumination | 5 |
| 4 | License plate illumination | 5 |
| 5 | Convenience system, cruise control, heated seats, air conditioning | 7.5 |
| 6 | Central locking system | 5 |
| 7 | Reverse lights | 10 |
| 8 | Telephone | 5 |
| 9 | ABS control module | 5 |
| 10 | Engine management (gasoline) | 10 |
| 11 | Instrument cluster, automatic transmission shift lock solenoid | 5 |
| 12 | Data Link Connector (DLC) power supply, telephone, navigation system | 7.5 |
| 13 | Brake lights | 10 |
| 14 | Interior lighting, central locking system | 10 |
| Interior dome light | 5 | |
| 15 | Instrument cluster, automatic transmission, auto-dimming rearview mirror | 5 |
| 16 | A/C compressor clutch, radiator cooling fan run-on, windshield washer pump | 10 |
| 17 | Heated door locks | 7.5 |
| 18 | Right high beam headlight | 10 |
| 19 | Left high beam headlight | 10 |
| 20 | Right low beam headlight, headlight range control | 10 |
| 21 | Left low beam headlight | 10 |
| 22 | Right parking light / taillight | 5 |
| 23 | Left parking light / taillight | 5 |
| 24 | Windshield wipers, washer pump | 20 |
| 25 | HVAC blower motor, air recirculation, air conditioning | 25 |
| 26 | Heated rear window, heated exterior mirrors | 20 |
| 27 | Rear window wiper | 10 |
| 28 | Fuel pump | 15 |
| 29 | Engine management (gasoline) | 15 |
| Engine management (diesel) | 10 | |
| 30 | Sunroof | 20 |
| 31 | Automatic transmission | 20 |
| 32 | Engine management (gasoline) | 10 |
| 30 | Engine management (diesel) | |
| 33 | Headlight washer system | 20 |
| 34 | Engine management | 10 |
| 35 | Trailer connector (continuous power) | 30 |
| 36 | Front and rear fog lights | 15 |
| 37 | Ignition switch (S-contact), Terminal 86s (radio) | 10 |
| 38 | Luggage compartment lighting, central locking system, power windows | 15 |
| 39 | Anti-theft alarm system | 15 |
| 40 | Horn | 20 |
| 41 | Cigarette lighter | 15 |
| 42 | Radio / Audio system | 25 |
| 43 | Engine management | 10 |
| 44 | Heated seats | 15 |
Central Relay Box
The central relay box is located under the dashboard on the driver's side.
| Diagram | |
|---|---|
|
|
| No. | Function |
| 1 | Horn relay |
| 2 | Tail light bulb failure warning relays |
| 3 | |
| 4 | Power folding mirror control module |
| 5 | |
| 6 | Telephone isolation relay |
| 7 | Unassigned |
| 8 | Unassigned |
| 9 | Unassigned |
| 10 | Unassigned |
| 11 | Starter and reverse light relay |
| 12 | Headlight washer relay |
| 13 | Radiator cooling fan after-run relay (A/C) |
| I | Dual-tone horn relay |
| II | Load reduction relay (X-contact) |
| III | Intermittent windshield wiper relay |
| IV | Fuel pump relay / Glow plug relay |
| V | Diesel fuel injection relay |
| VI | Fog light relay |
| A | Power seat heating fuse |
| B | Unassigned |
| C | Power window fuse |
