Subaru WRX (2015 – 2021) Fuse Box Diagrams & Location
The Subaru WRX (2015–2021) features multiple fuse boxes that protect essential electrical systems and components. Knowing their locations and fuse functions makes troubleshooting electrical problems easier. This blog provides clear fuse box locations and diagrams for the Subaru WRX, helping you quickly identify the correct fuse.
Fuse Box Location
Passenger Compartment Fuse Box
The fuse box is located behind the cover to the left of the steering wheel.
Engine Compartment Fuse Box
Fuse Box Diagrams
Passenger Compartment Fuse Box
| № | Amp rating | Circuit |
|---|---|---|
| 1 | 20A | (Not available)
2018-2021: R.FOG TRAIL |
| 2 | 7.5A | Combination meter 2018-2021: METER IG |
| 3 | 15A | Door locking |
| 4 | 10A | Front wiper deicer relay 2018-2021: IG2 |
| 5 | Empty | |
| 6 | 7.5A | Remote control rear view mirrors, Seat heater relay
2018-2021: MIR |
| 7 | 10A/15A | Combination meter, Integrated unit 2018-2021: UNIT+B |
| 8 | 7.5A | Stop light
2018-2021: STOP |
| 9 | 7.5A | Front wiper deicer
2018-2021: WIPER DEICE |
| 10 | 7.5A | Power supply (battery) 2018-2021: D-OP+B |
| 11 | 7.5A | Turn signal unit
2018-2021: TURN IG |
| 12 | 15A | Transmission control unit, Engine control unit, Integrated unit
2018-2021: UNIT IG1 |
| 13 | 20A | Accessory power outlet (center console) 2018-2021: 12V PLUG |
| 14 | 10A | Parking light, Tail light, Rear combination light
2018-2021: TAIL CLEARANCE |
| 15 | 10A | Trunk light, Keyless unit
2018-2021: BKUP+B |
| 16 | 7.5A | Illumination 2018-2021: ILM |
| 17 | 15A | Seat heaters
2018-2021: SEAT HTR |
| 18 | 10A | Backup light
2018-2021: LAMP IG |
| 19 | – | Daytime running lights 2018-2021: – |
| 20 | 10A | Accessory power outlet (instrument panel)
2018-2021: CIGAR |
| 21 | 7.5A/10A | Starter relay
2018-2021: START |
| 22 | 10A/7.5A | Air conditioner, Rear window defogger relay coil 2018-2021: A/C IG |
| 23 | Empty | |
| 24 | 10A | Audio unit, Navigation system (if equipped)
2018-2021: AUDIO NAVI |
| 25 | 15A | SRS airbag system
2018-2021: SRS AIR BAG |
| 26 | 7.5A | Power window relay, Radiator main fan relay 2018-2021: IG1 |
| 27 | 15A | Blower fan
2018-2021: BLOWER |
| 28 | 15A | Blower fan
2018-2021: BLOWER |
| 29 | 10A | Fog light 2018-2021: F.FOG |
| 30 | Empty | |
| 31 | 7.5A | Auto air conditioner unit, Integrated unit
2018-2021: ACC |
| 32 | 7.5A | Clutch switch, Steering lock control unit
2018-2021: STR LOCK |
| 33 | 7.5A | Vehicle Dynamics Control unit 2018-2021: UNIT IG2 |
Engine Compartment Fuse Box
STI
| № | Amp rating | Circuit |
|---|---|---|
| A | Main fuse | |
| 1 | 30A | ABS unit, Vehicle Dynamics Control unit
2018-2019: ABS SOL |
| 2 | 25A | Main fan (cooling fan)
2018-2019: MAIN FAN |
| 3 | 25A | Sub fan (cooling fan) 2018-2019: SUB FAN |
| 4 | Empty | |
| 5 | 25A | Audio
2018-2019: AUDIO AMP |
| 6 | 30A | Headlight (low beam)
2018-2019: H/L LO |
| 7 | 15A | Headlight (high beam) 2018-2019: H/L HI |
| 8 | 20A | Back-up |
| 9 | 15A | Horn |
| 10 | 25A | Rear window defogger, Mirror heater
2018-2019: R.DEF |
| 11 | 15A | Fuel pump
2018-2019: FUEL PI, P |
| 12 | 10A | Transmission control unit |
| 13 | 7.5A | Engine control unit 2018-2019: EGI+B |
| 14 | 15A | Turn and hazard warning flasher
2018-2019: HAZARD |
| 15 | 15A | Tail and illumination re lay
2018-2019: LIGHTING |
| 16 | 7.5A | Alternator 2018-2019: ALT-S |
| 17 | Empty | |
| 18 | 20A | Injection
2018-2019: INJ |
| 19 | 15A | Headlight (low beam -right hand)
2018-2019: H/L LO RH |
| 20 | 15A | Headlight (low beam -left hand) 2018-2019: H/L LO LH |
| 21
22 |
10A
7.5A |
Secondary air combination valve 2018-2019: AIR CUT 2018-2019: (Telematics) |
Except STI
| № | Amp rating | Circuit |
|---|---|---|
| A | Main fuse | |
| 1 | 30A | ABS unit, Vehicle Dynamics Control unit
2018-2019: ABS SOL |
| 2 | 25A | Main fan (cooling fan) 2018-2019: MAIN FAN |
| 3 | 25A | Sub fan (cooling fan)
2018-2019: SUB FAN |
| 4 | Empty | |
| 5 | 25A | Audio
2018-2019: AUDIO AMP |
| 6 | 30A | Headlight (low beam) 2018-2019: H/L LO |
| 7 | 15A | Headlight (high beam)
2018-2019: H/L HI |
| 8 | 20A | Back-up |
| 9 | 15A | Horn |
| 10 | 25A | Rear window defogger, Mirror heater
2018-2019: R.DEF |
| 11 | 15A | Fuel pump 2018-2019: FUEL PI, P |
| 12 | 20A/10A | Transmission control unit |
| 13 | 7.5A | Engine control unit
2018-2019: EGI+B |
| 14 | 15A | Turn and hazard warning flasher
2018-2019: HAZARD |
| 15 | 15A | Tail and illumination relay 2018-2019: LIGHTING |
| 16 | 7.5A | Alternator
2018-2019: ALT-S |
| 17 | Empty | |
| 18 | 20A | Injection
2018-2019: INJ |
| 19 | 15A | Headlight (low beam -right hand) 2018-2019: H/L LO RH |
| 20 | 15A | Headlight (low beam -left hand)
2018-2019: H/L LO LH |
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