2021 Subaru Outback Fuse Box Diagram & Amperage
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Quick answer
The 2021 Subaru Outback has three main fuse box locations:
- Under-hood Fuse Box: Located in the engine compartment, typically on the driver's side.
- Dash Fuse Box: Located on the driver's side kick panel, behind a removable cover.
- Cargo Area Fuse Box: Located in the cargo area, often behind a trim panel on the passenger side.
Under-hood Fuse Box Diagram
The under-hood fuse box contains fuses and relays for major components like the engine control module (ECM), fuel pump, headlights, and cooling fan. Always refer to the fuse box lid diagram for the most accurate information as variations can occur based on trim level and manufacturing region.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 15A | Blue | Fuel Pump (FP) |
| 2 | 20A | Yellow | ECM/PCM (Main) |
| 3 | 10A | Red | Ignition Coil |
| 4 | 20A | Yellow | Headlight (Low Beam - Left) |
| 5 | 20A | Yellow | Headlight (Low Beam - Right) |
| 6 | 10A | Red | Headlight (High Beam - Left) |
| 7 | 10A | Red | Headlight (High Beam - Right) |
| 8 | 15A | Blue | Anti-lock Brake System (ABS) Motor |
| 9 | 25A | Clear | Blower Motor (Main) |
| 10 | 10A | Red | A/C Clutch |
| 11 | 30A | Green | Starter Relay |
| 12 | 10A | Red | Cooling Fan (Main) |
| 13 | 15A | Blue | Horn |
| 14 | 15A | Blue | Wiper Motor |
| 15 | 10A | Red | Transmission Control Module (TCM) |
| 16 | 15A | Blue | Power Steering |
| 17 | 10A | Red | O2 Sensor |
| 18 | 10A | Red | EVAP System |
| 19 | 20A | Yellow | Alternator (S-terminal) |
| 20 | 15A | Blue | Electronic Power Steering (EPS) |
| 21 | 7.5A | Brown | Main Relay |
| 22 | 20A | Yellow | Subaru EyeSight System |
| 23 | 5A | Tan | Engine Control System |
| 24 | 25A | Clear | Power Seat (Driver) |
| 25 | 25A | Clear | Power Seat (Passenger) |
Relay Locations (Under-hood):
- Fuel Pump Relay: Often next to the fuel pump fuse.
- Ignition Relay: Powers ignition coils and other engine components.
- Starter Relay: Engages the starter motor.
- Cooling Fan Relays: Control the engine cooling fan(s).
- A/C Compressor Relay: Engages the A/C compressor clutch.
- Main Relay: Supplies power to various engine management systems.
Dash Fuse Box Diagram
The dash fuse box, located on the driver's side kick panel, protects circuits for interior accessories, lighting, and convenience features. Remove the plastic cover to access it. Always cross-reference with your vehicle's specific diagram.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 26 | 10A | Red | Radio/Infotainment System |
| 27 | 15A | Blue | Cigar Lighter / 12V Power Outlet (Front) |
| 28 | 7.5A | Brown | Airbag System (SRS) |
| 29 | 10A | Red | Instrument Cluster |
| 30 | 5A | Tan | ABS/VDC Control Unit |
| 31 | 7.5A | Brown | Tail Lights (Left) |
| 32 | 7.5A | Brown | Tail Lights (Right) |
| 33 | 10A | Red | Brake Lights |
| 34 | 20A | Yellow | Power Windows (Driver) |
| 35 | 20A | Yellow | Power Windows (Passenger Front) |
| 36 | 15A | Blue | Door Locks |
| 37 | 10A | Red | Sunroof (if equipped) |
| 38 | 5A | Tan | Occupant Detection System |
| 39 | 15A | Blue | Rear Wiper (if equipped) |
| 40 | 20A | Yellow | Heated Seats (Driver) |
| 41 | 20A | Yellow | Heated Seats (Passenger Front) |
| 42 | 10A | Red | USB Ports |
| 43 | 7.5A | Brown | Mirror Defroster |
| 44 | 10A | Red | Interior Illumination |
| 45 | 5A | Tan | Combination Meter |
Relay Locations (Dash):
- Accessory Relay: Powers various interior accessories when the ignition is on.
- Power Window Relays: Control power window operation.
- Door Lock Relay: Controls central locking.
Cargo Area Fuse Box Diagram
The fuse box in the cargo area typically manages power for accessories in the rear of the vehicle, such as the rear power outlet, power liftgate (if equipped), and trailer lights (if a factory tow package is present). Its exact location can vary, but it
Before you pull a fuse on the 2021 Subaru Outback
- 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 Outback
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 Outback 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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