Mazda 3 (2010) – fuse box diagram
Year of production: 2010
Fuse block (Engine compartment)

engine compartment
Position | Description | Fuse rating [A] | Protected component |
1 | FAN 2 | — | — |
2 | ENG MAIN | 40 | Engine control system |
3 | BTN 1 | 50 | For protection of various circuits |
4 | A/C MAG | 7,5 | Air conditioner |
5 | H/L HI | 20 | Headlight high beam |
6 | FOG | 15 | Fog lights* |
7 | H/L WASH | — | — |
8 | SUNROOF | 15 | Moonroof* |
9 | F.DEF RH | — | — |
10 | F.DEF LH | — | — |
11 | FAN 1 | 40 | Cooling fan |
12 | ROOM | 15 | Interior lights |
13 | TCM | 15 | TCM* |
14 | DSC | 20 | Dynamic Stability Control system* |
15 | BTN 2 | 7,5 | For protection of various circuits |
16 | AT PUMP | — | — |
17 | HEATER | 40 | Heater |
18 | INJ | — | — |
19 | R.DEF | 30 | Rear window defroster |
20 | IGKEY 2 | 40 | For protection of various circuits |
21 | IGKEY 1 | 40 | For protection of various circuits |
22 | HORN | 15 | Horn |
23 | STOP | 15 | Brake lights |
24 | ENG+B | 10 | Engine control system |
25 | FUEL PUMP | 25 | Fuel system |
26 | ABS | 40 | ABS |
27 | SEAT WARM | 20 | Seat warmer* |
28 | EHPAS | 80 | Electro-Hydraulic Power Assist Steering |
29 | — | — | — |
30 | ABS IG | 7,5 | ABS |
31 | — | — | — |
32 | H/L LO RH | 15 | Headlight low beam (RH) |
33 | H/L LO LH | 15 | Headlight low beam (LH) |
34 | ILLUM | 7,5 | Dashboard illumination |
35 | TAIL | 15 | Tail lamp |
36 | ENG INJ | 15 | Engine control system |
37 | ENG BAR | 15 | PCM |
38 | ENG BAR 2 | 20 | PCM |
39 | ETV | 15 | Electric throttle valve |
* Some models |
Fuse block (Passenger’s side)
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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