The Mazda RX-8 is a sports car manufactured by Mazda as the successor to the RX-7. It is a four-seat, rear-wheel-drive sports coupe featuring rear-hinged doors without a central B-pillar. It is the world's only mass-production vehicle powered by a twin-rotor rotary engine. In this article, we provide detailed fuse box diagrams and relay assignments for the first-generation Mazda RX-8 (chassis SE) for model years 2003 through 2012.
Below you will find fuse box locations, photos, and circuit diagrams. The fuses for the "Cigarette lighter" and "Fuel Pump" are highlighted in bold.
Engine Compartment
The power distribution box (fuse box) is located on the left side of the engine compartment. To access the fuses, unlatch and remove the protective cover.
Fuse box overview.
| Diagram | ||
|---|---|---|
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| No. | Relay Description | |
| 1 | Trunk lid opener relay | |
| 2 | Secondary air pump relay | |
| 3 | Accessory (ACC) relay | |
| 4 | Horn relay | |
| 5 | Front fog light relay | |
| 6 | Electronic control relay | |
| 7 | Main relay | |
| 8 | Headlight relay | |
| 9 | Starter relay | |
| 10 | Ignition relay | |
| 11 | Parking light relay | |
| 12 | Cooling fan relay No. 3 | |
| 13 | A/C compressor relay | |
| 14 | Rear window defroster relay | |
| 15 | Cooling fan relay No. 1 | |
| 16 | Heated seat relay | |
| 17 | Fuel pump relay | |
| 18 | Cooling fan relay No. 2 | |
| 19 | Blower fan relay | |
| 20 | Fuel pump speed control relay | |
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| No. | Circuit Protected / Description | Rating (A) |
| 1 | Main fuse | 120 |
| 2 | HEATER – Blower motor / heater | 40 |
| 3 | AIR PUMP – Secondary air pump | 60 |
| 4 | BTN – Power door locks, power windows, sunroof, interior lights | 30 |
| 5 | DEFOG – Rear window defroster | 50 |
| 6 | FAN – Engine cooling fan | 30/40 |
| 7 | ABS, DSC – Anti-lock Braking System, Dynamic Stability Control | 60 |
| 8 | ACC – Cigarette lighter, power mirrors, accessory socket, audio system | 30 |
| 9 | FAN 2 – Cooling fan 2 (2008–2012) | 30 |
| 10 | HEAD – High beam headlights, headlight washers | 15 |
| 11 | HEAD LOW R – Right headlight (low beam) | 15 |
| 12 | HEAD LOW L – Left headlight (low beam) | 15 |
| 13 | DRL – Daytime running lights | 15 |
| 14 | DSC – Dynamic Stability Control | 30 |
| 15 | SEAT WARM – Heated seats | 20 |
| 16 | H/CLEAN – Headlight washers | 20 |
| 17 | R.FOG – Rear fog light | |
| 18 | FOG – Front fog lights | 15 |
| 19 | A/C – Air conditioning compressor | 10 |
| 20 | IG – Ignition / Engine control | 30 / 40 |
| 21 | P.WIND 1 – Power windows (2008–2012) | 30 |
| 22 | IG KEY – Ignition switch / Engine control | 15 |
| 23 | STOP – Brake lights | 10 / 15 |
| 24 | F/PUMP – Fuel pump | 20 |
| 25 | HORN – Horn | 15 |
| 26 | HAZARD – Hazard warning lights, turn signals | 15 |
| 27 | ETV – Electronic throttle valve | 15 |
| 28 | ST – Starter signal | 10 |
| 29 | WIPER – Windshield wipers and washer | 20 |
| 30 | P.WIND – Power windows (2003–2007) | 20 |
| TCM – Transmission Control Module (2008–2012) | 15 | |
| 31 | ENGINE – Powertrain Control Module (PCM), airbags, ABS, power steering | 15 |
| 32 | TAIL – Parking lights, license plate lights | 10 |
| 33 | ILLUMI – Interior instrument illumination | 7.5 / 10 |
| 34 | EGI COMP1 – Engine control components | 10 / 15 |
| 35 | EGI COMP2 – Engine control components | 10 |
| 36 | EGI INJ – Fuel injectors / Engine electronics | 15 |
| 37 | P.WIND 2 – Power windows | 20 |
A separate 60 A Electronic Power Steering (EPS) main fuse is located on the positive battery terminal.
Passenger Compartment
The interior fuse box is located on the driver's side lower pillar (kick panel), adjacent to the footwell.
Access detail.
| Diagram | ||
|---|---|---|
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| No. | Circuit Protected / Description | Rating (A) |
| 1 | CIGAR – Cigarette lighter | 15 |
| 2 | ACC – Audio system, power mirrors | 7.5 |
| 3 | AUX PWR / OUTLET – Accessory power outlet (2003–2007) | 20 |
| 4 | A/C – Air conditioning system | 7.5 |
| 5 | METER – Instrument cluster (2005–2012) | 10 |
| 6 | TCM – Transmission Control Module (2005–2007) | 10 |
| 7 | Not used | - |
| 8 | Not used | - |
| 9 | MIRROR DEF – Heated side mirrors | 10 |
| 10 | DSC – Dynamic Stability Control system | 7.5 |
| 11 | AUDIO – Audio system | 20 / 25 |
| 12 | D.LOCK – Power door locks, sunroof | 30 |
| 13 | P.WIND – Power windows (2003–2007) | 30 |
| OUTLET – Accessory power outlet (2008–2012) | 15 | |
| 14 | ROOM – Interior dome/map lighting | 15 |
| 15 | Not used | - |
| 16 | Not used | - |