Toyota Prius Fuse Box: Location & Guide
TL;DR
Prius hatchbacks (all generations 2004-present) use an under-hood engine fuse box plus a driver's-footwell interior fuse box; check the lid diagram for exact fuse numbers and amperages.
Where the Prius fuse boxes are located
On every generation of the Prius hatchback there are two primary fuse locations. The engine compartment fuse and relay box sits at the back corner of the engine bay, close to the 12V auxiliary battery, and holds the higher-amperage fuses and relays for things like the headlights, cooling fans, and the hybrid system's low-voltage circuits. The interior fuse box is mounted low on the driver's side, under the left edge of the dashboard near the door opening (kick panel area) - you may need to turn the steering wheel and tilt the column down, or remove a small trim panel, to see it clearly.
How to open each box
The engine-bay lid is held by plastic side tabs: press or squeeze them in and lift the cover straight up, no tools needed on most model years. The interior panel cover usually unclips by hand or, on some years, is held by one or two small screws or a single retaining clip along its edge; it swings or pulls down and out once released. Always confirm on your own car, since panel styling changed across the four generations covered here.
Finding the correct fuse legend
Never guess at a fuse's amperage. The definitive legend - a diagram naming every fuse and relay position and its rating - is printed on a sticker on the inside of the fuse box lid itself, and the same layout is reproduced in the electrical or "do-it-yourself maintenance" chapter of the owner's manual. Because Toyota revised fuse maps between model years and options packages, the lid diagram in your specific car is the only fully reliable source - this page intentionally does not list individual fuse numbers.
Fuses that most commonly cause complaints
- Cigarette lighter / 12V accessory outlet fuse - blows from phone chargers, tire inflators, or other aftermarket accessories left plugged in; symptom is a dead outlet with everything else working normally.
- Radio / infotainment fuse - a blown fuse here kills the touchscreen, backup camera display, and sometimes steering-wheel audio controls all at once.
- Interior/dome light fuse - covers dome lights, glovebox light, and often the trunk/cargo light; a blown fuse leaves the cabin dark even with doors open.
- Blower motor fuse - if the climate control fan stops on all speeds while the display still lights up, this fuse (or its relay) is a prime suspect.
- Fuel pump relay/fuse circuit - a no-start or a car that cranks but will not fire can point here, though on a hybrid this circuit also interacts with the hybrid control system, so professional diagnosis is worthwhile.
Checking and replacing a fuse safely
With the engine off, pull the suspected fuse using the plastic fuse-puller tool clipped inside most Prius fuse box lids. Hold it up to the light: a good fuse has an intact, unbroken metal strip between its two legs, while a blown one shows a visibly gapped or discolored strip. If you are unsure, a simple test light or multimeter across the two exposed fuse prongs (with the fuse still in place and ignition on) will confirm continuity. Replace a blown fuse only with one of the exact same amperage - printed on the fuse body and on the lid diagram - never a higher rating, since that removes the circuit's intended protection and risks wiring damage or fire.
When a fuse keeps blowing
A fuse that blows once may simply have been overloaded by an accessory. A fuse that blows again immediately after replacement almost always signals a short circuit or chafed wiring downstream, not a weak fuse. In that case, stop replacing fuses and have the circuit diagnosed - pulling stored diagnostic trouble codes from the vehicle's computer is often the fastest way to narrow down which module or wiring section is at fault before further electrical work is done.
| Generation / years | Fuse box | Location | How to access |
|---|---|---|---|
| 2004-2009 (2nd gen) | Engine compartment box | Rear corner of engine bay, near 12V battery | Unclip side tabs, lift lid straight up |
| 2004-2009 (2nd gen) | Interior box | Driver's footwell, under left dash edge | Unclip or unscrew cover, swing down |
| 2010-2015 (3rd gen) | Engine compartment box | Rear corner of engine bay, near 12V battery | Unclip side tabs, lift lid straight up |
| 2010-2015 (3rd gen) | Interior box | Driver's footwell, under left dash edge | Unclip cover, pull down/out |
| 2016-2022 (4th gen) | Engine compartment box | Rear corner of engine bay, near 12V battery | Unclip side tabs, lift lid straight up |
| 2016-2022 (4th gen) | Interior box | Driver's footwell, under left dash edge near door | Remove small trim/kick panel, unclip cover |
| 2023-present (5th gen) | Engine compartment box | Rear corner of engine bay, near 12V battery | Unclip side tabs, lift lid straight up |
| 2023-present (5th gen) | Interior box | Driver's footwell, under left dash edge | Unclip cover, swing down |
Summary
| Engine-bay fuse box location | Rear corner of engine compartment, near 12V battery |
|---|---|
| Interior fuse box location | Driver's footwell, under left edge of dashboard |
| Engine-bay lid opening method | Unclip plastic side tabs, lift straight up |
| Interior panel opening method | Unclip cover (some years: 1-2 screws), swing down |
| Official fuse legend location | Sticker inside each box lid + owner's manual electrical chapter |
| Generations covered | 2004-2009, 2010-2015, 2016-2022, 2023-present |
| Golden rule when replacing a fuse | Match the exact amp rating printed on the fuse - never go higher |
Full diagnostics
For the complete step-by-step diagnostic and repair guide, see Toyota Prius: Common Problems, Fault Codes & Repairs.
Frequently asked questions
Where is the fuse box on a Toyota Prius?
Every Prius hatchback from 2004 to present has two fuse boxes: one in the engine compartment near the 12V battery (for higher-amperage circuits like fans and lighting), and one inside the car in the driver's footwell under the left edge of the dashboard (for cabin electronics). Both lids unclip by hand on most model years.
How do I know which fuse controls which function on my Prius?
Do not guess. The full fuse legend, showing every fuse and relay position with its function and amp rating, is printed on a sticker on the underside of each fuse box lid, and the same chart is repeated in the owner's manual's electrical or maintenance chapter. Fuse maps changed across generations and trims, so always check the diagram for your specific car.
Why does my Prius cigarette lighter or 12V outlet stop working?
This is one of the most commonly blown fuses on the Prius, usually from phone chargers, air compressors, or other accessories drawing too much current or being plugged/unplugged while powered. Check the outlet's dedicated fuse against the lid diagram, and replace it only with a fuse of the identical amp rating.
Why does a new fuse in my Prius blow again right away?
A fuse that blows immediately after replacement is not a fuse problem - it means there is a short circuit or damaged wiring on that circuit. Continuing to replace fuses in that situation risks wiring damage or fire; instead, have the circuit diagnosed, and pulling any stored diagnostic trouble codes from the vehicle's computer can help a technician pinpoint the faulty component faster.