The third-generation Mazda 3 debuted on June 26, 2013, at the Australian International Motor Show. Built on the Skyactiv platform, it replaced the Ford-derived C1 platform. This guide provides detailed fuse box diagrams and relay assignments for the Mazda 3 (BM chassis; SkyActiv Vehicle Architecture) model years 2014, 2015, 2016, 2017, 2018, and 2019.
Below are the locations, diagrams, and photos of the power distribution boxes. Fuses for the “Cigarette Lighter” and “Fuel Pump” are highlighted in bold.
Engine Compartment
The power distribution box is located near the battery. Remove the protective cover to access the fuses and relays.
General view.
Fuse and relay assignment diagram (from the cover label).
| Diagram | ||
|---|---|---|
|
||
| No. | Circuit / Function | Rating (A) |
| 1 | Front fog lights (if equipped) | 15 |
| 2 | High-beam headlights (halogen) | 20 |
| 3 | Headlight washers | 20 |
| 4 | Brake lights | 10 |
| 5 | Interior lighting | 15 |
| 6 | Engine management system | 7.5 |
| 7 | Fuel heater (FUEL WARM) | 15 |
| 8 | Hazard lights, turn signals | 25 |
| 9 | ABS, Dynamic Stability Control (DSC) | 30 |
| 10 | Instrument cluster (METER2) | 7.5 |
| 11 | Audio system | 7.5 |
| 12 | Bose® audio system (if equipped) | 25 |
| 13 | Audio system | 15 |
| 14 | Fuel pump | 15 |
| 15 | Right headlight (LED), daytime running lights (DRL) (if equipped) | 15 |
| 16 | Electric oil pump / Transmission control (AT PUMP) | 15 |
| 17 | Horn | 15 |
| 18 | Taillights, license plate light, parking lights, front side marker lights | 15 |
| 19 | Heated steering wheel (if equipped) | 15 |
| 20 | Transmission Control Module (TCM) | 15 |
| 21 | Rear window wiper (if equipped) | 15 |
| 22 | Air conditioning (A/C) | 7.5 |
| 23 | Engine management system (ENGINE3) | 15 |
| 24 | Engine management system (ENGINE2) | 15 |
| 25 | Engine management system (ENGINE1) | 15 |
| 26 | Glow plug signal (GLOW SIG) | 5 |
| 27 | Electric Variable Valve Timing (EVVT) | 20 |
| 28 | Windshield wiper and washer | 20 |
| 29 | DC-DC converter / regulator (DC DC REG) | 30 |
| 30 | Electric parking brake (left) (if equipped) | 30 |
| 31 | Auxiliary cooling fan (ADD FAN DE) | 40 |
| 32 | Power windows | 30 |
| 33 | Low-beam headlight (right) (halogen) | 15 |
| 34 | Left headlight (LED) / Low-beam headlight (left) (halogen) | 15 |
| 35 | Instrument cluster | 10 |
| 36 | Ignition circuit 2 (IG2) | 30 |
| 37 | Electric parking brake (right) (if equipped) | 30 |
| 38 | Radiator cooling fan | 40 |
| 39 | DC-DC converter protection (DCDC DE) | 40 |
| 40 | Supplemental Restraint System (SRS airbags) | 7.5 |
| 41 | Engine management system | 15 |
| 42 | Control unit ignition circuit (C/U IG1) | 15 |
| 43 | Instrument cluster (METER3) | 10 |
Passenger Compartment
The fuse box is located behind the lower kick panel on the driver’s side. Remove the protective cover to access the panel.
General view of the Mazda 3 (BM) interior fuse box.
| Diagram | ||
|---|---|---|
|
||
| No. | Circuit / Function | Rating (A) |
| 1 | Power seat (if equipped) | 30 |
| 2 | Power door locks | 25 |
| 3 | Power windows | 25 |
| 4 | Heated seats (if equipped) | 20 |
| 5 | Rear auxiliary power outlets | 15 |
| 6 | Seat occupant weight sensor | 15 |
| 7 | Power sunroof (if equipped) | 10 |
| 8 | Heated side mirrors (if equipped) | 7.5 |
| 9 | Auxiliary power outlets (R.OUTLET1) | 15 |
| 10 | Power side mirrors | 7.5 |
| 11 | Auxiliary power outlets, Cigarette lighter | 15 |
| 12 | Automatic transmission shift indicator (if equipped) | 7.5 |
| 13 | Supplemental Restraint System (SRS1) | 7.5 |
| 14 | Instrument cluster (METER1) | 10 |
| 15 | Control unit ignition circuit (C/U IG1) | 15 |