2021 Subaru Crosstrek Fuse Box Diagram
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Quick answer
Your 2021 Subaru Crosstrek has two primary fuse box locations:
- Under the hood: In the engine bay, on the driver's side, near the battery.
- In the passenger compartment: Under the dashboard, on the driver's side, near the kick panel.
Under-Hood Fuse Box
This fuse box is located in the engine bay on the driver's side. It contains higher-amperage fuses and relays that control major vehicle systems.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 30A | Pink | Radiator fan |
| 2 | 30A | Pink | Radiator fan |
| 3 | 20A | Yellow | Main fan motor |
| 4 | 20A | Yellow | Main fan motor |
| 5 | 30A | Pink | ABS motor |
| 6 | 30A | Pink | ABS motor |
| 7 | 20A | Yellow | Windshield wiper de-icer |
| 8 | 15A | Blue | Horn |
| 9 | 10A | Red | Headlight washer |
| 10 | 15A | Blue | Front fog lights |
| 11 | 30A | Pink | Power window relay |
| 12 | 20A | Yellow | Sunroof motor |
| 13 | 15A | Blue | Fuel pump |
| 14 | 15A | Blue | Ignition coil |
| 15 | 10A | Red | A/C compressor clutch |
| 16 | 7.5A | Brown | Alternator |
| 17 | 15A | Blue | Front accessory power outlet |
| 18 | 15A | Blue | Low beam headlights (Right) |
| 19 | 15A | Blue | Low beam headlights (Left) |
| 20 | 15A | Blue | High beam headlights |
| 21 | 10A | Red | Tail and parking lights |
| 22 | 10A | Red | Brake lights |
| 23 | 7.5A | Brown | Interior lights |
| 24 | 15A | Blue | Starter signal |
| 25 | 10A | Red | ECM/PCM |
| 26 | 15A | Blue | Transmission control module |
| 27 | 10A | Red | Airbag system |
| 28 | 15A | Blue | Heated mirrors |
| 29 | 30A | Pink | Blower motor |
Relay Locations (Under-Hood)
- Starter Relay: Controls power to the starter motor.
- Fuel Pump Relay: Controls power to the fuel pump.
- A/C Clutch Relay: Engages and disengages the A/C compressor.
- Blower Motor Relay: Controls the speed of the interior climate fan.
- Ignition Relay: Provides power to the ignition system.
Passenger Compartment Fuse Box
This fuse box is located under the dashboard on the driver's side. To access it, you may need to remove a small trim panel.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 10A | Red | SRS Airbag System |
| 2 | 10A | Red | Engine Control Module (ECM/PCM) |
| 3 | 15A | Blue | Fuel Pump |
| 4 | 7.5A | Brown | Meter and Gauge |
| 5 | 15A | Blue | 12V Power Outlet (Cigar Lighter) |
| 6 | 10A | Red | Audio System/Infotainment |
| 7 | 20A | Yellow | Power Seat |
| 8 | 15A | Blue | Power Outlet (Console) |
| 9 | 10A | Red | Heated Seats |
| 10 | 7.5A | Brown | Interior Lights |
| 11 | 10A | Red | Turn Signal Lights |
| 12 | 7.5A | Brown | Steering Wheel Switches |
| 13 | 10A | Red | Power Door Locks |
| 14 | 10A | Red | Keyless Access |
| 15 | 7.5A | Brown | Accessory Power |
Note: Fuse numbers and protected circuits can vary based on your Crosstrek's trim level and options. Always consult the fuse diagram printed on the inside of the fuse box cover to verify the correct fuse for your specific vehicle.
How to test a fuse
A blown fuse can be identified in two ways:
- Visual Inspection: Pull the fuse from its slot. Hold it up to the light. Inside the plastic housing, you will see a thin metal strip. If this strip is broken or melted, the fuse is blown.
- Multimeter Test: For a more definitive test, use a multimeter set to the continuity setting. Touch one probe to each of the two metal prongs on the top of the fuse. If the multimeter beeps or shows a reading of near-zero ohms, the fuse is good. If it remains silent or shows an open circuit (OL), the fuse is blown.
When replacing a fuse, always use a new fuse with the exact same amperage rating. Using a fuse with a higher rating can cause damage to the electrical system.
Common blown fuses on this vehicle
- Fuse #5 (Passenger Compartment): 12V Power Outlet / Cigar Lighter. This fuse often blows due to faulty phone chargers or other accessories plugged into the power outlet. Before replacing the fuse, unplug any devices from the power outlets.
- Fuse #13 (Under-Hood): Fuel Pump. If your Crosstrek cranks but won't start, a blown fuel pump fuse could be the culprit. A failing fuel pump can draw too much current, causing the fuse to blow. If this fuse blows repeatedly, have the fuel pump and its circuit checked by a qualified technician.
- Fuse #6 (Passenger Compartment): Audio System/Infotainment. If your radio or infotainment screen suddenly goes dark, check this fuse. Aftermarket audio equipment is a common cause for this fuse to blow if not installed correctly.
Find a trusted shop on Repairius.
Before you pull a fuse on the 2021 Subaru Crosstrek
- Use the label printed on the panel cover or the owner's manual for your exact build. Layouts change with options, model year and build date, so a chart for another truck can be wrong.
- Replace a blown fuse only with the same amp rating. A larger fuse can let wiring overheat.
- A fuse that blows again right away means a short or failing component downstream. Find the cause before replacing it again.
- A good fuse doesn't prove the circuit works — relays, grounds and connectors fail too.
- Disconnect the battery before working near high-current fuses or cables.
Learn more: How fuses, relays and truck electrical systems work
More specs for the 2021 Subaru Crosstrek
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2021 Subaru Crosstrek Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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