Mazda3 2021 Fuse Box Info
Passenger compartment fuse box location:
The fuse box is located in the left kick panel.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | - | - |
| 2 | - | - |
| 3 | - | - |
| 4 | 15A | Power door locks (Driver) |
| 5 | 15A | Power door locks (Passenger) |
| 6 | - | - |
| 7 | - | - |
| 8 | - | - |
| 9 | 30A | Power windows (Driver) |
| 10 | 30A | Power windows (Passenger) |
| 11 | 30A | Power seat (Driver)* |
| 12 | - | - |
| 13 | 15A | Audio |
| 14 | - | - |
| 15 | 15A | Liftgate lock |
| 16 | 15A | Illumination |
| 17 | 10A | Brake lights |
| 18 | 10A | Reverse lights |
| 19 | 10A | Rear turn signal lights |
| 20 | 10A | Taillights |
| 21 | 10A | Taillights |
| 22 | 7.5A | Air bag* |
| 23 | - | - |
*Some models
Engine compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | - | - |
| 2 | 20A | Windshield wiper de-icer* |
| 3 |
30A 20A |
Engine control system - |
| 4 | 20A | S-VT |
| 5 | 40A | Engine control system |
| 6 | - | - |
| 7 |
15A 20A |
- Fuel pump |
| 8 | 15A | Engine control system |
| 9 | 15A | Transmission control system* |
| 10 | 15A | Engine control system |
| 11 | 7.5A | Air conditioner |
| 12 | 15A | Engine control system |
| 13 | 15A | - |
| 14 | 20A | Front seat warmer* |
| 15 | 20A | - |
| 16 | 15A | For protection of various circuits |
| 17 | - | - |
| 18 | 15A | For protection of various circuits |
| 19 | 60A | Power steering system |
| 20 | 15A | Headlight (LH) 1 |
| 21 | 15A | Headlight (RH) 1 |
| 22 | 15A | Keyless system |
| 23 | 30A | ABS, Dynamic stability control system |
| 24 | 15A | Headlight (LH) 2 |
| 25 | 15A | Headlight (RH) 2 |
| 26 | 7.5A | On board diagnostics |
| 27 | 25A | For protection of various circuits |
| 28 | 25A | For protection of various circuits |
| 29 | 15A | Windscreen washer |
| 30 | 15A | Accessory sockets |
| 31 | 15A | Horn |
| 32 | - | - |
| 33 | - | - |
| 34 | - | - |
| 35 | 50A | ABS, Dynamic stability control system |
| 36 | - | - |
| 37 | 40A | Rear window defogger |
| 38 | 50A | For protection of various circuits |
| 39 | - | - |
| 40 | 40A | Air conditioner |
| 41 | - | - |
| 42 | 20A | Windshield wipers |
| 43 | 30A | Cooling fan |
| 44 | 30A | Starter |
| 45 | 10A | Engine control system |
| 46 | 15A | Audio |
| 47 | 15A | For protection of various circuits |
| 48 | 7.5A | Air bag |
| 49 | 15A | Instrument cluster |
| 50 | 15A | Room lamp |
| 51 | 25A | Audio |
| 52 | 10A | Moonroof* |
| 53 | 15A | Engine control system |
| 54 | 15A | i-ACTIVSENSE |
| 55 | 50A | - |
| 56 |
50A 15A |
- Electric water pump* |
*Some models
