Finding the fuse box in your 2007 Mazda 3 is the first step when diagnosing electrical problems like non-working lights, accessories, or power features.
This quick guide explains exactly where the fuse boxes are located both inside the cabin and under the hood, helping you access and inspect fuses easily. With the right fuse box location, troubleshooting your Mazda 3 becomes much simpler.
Table of Contents
Cigar lighter (power outlet) fuses: #43 “CIGAR” in the passenger compartment fuse box, and fuse #29 “P.OUTLET” (since 2007) in the engine compartment fuse box.
Engine compartment
Without turbocharger
| Fuse or relay number | Description | Fuse amp rating | Protected Components |
|---|---|---|---|
| 1 | FAN | 40A | Cooling fan |
| 2 | P/ST | 80A | Power steering |
| 3 | BTN | 40A | For protection of various circuits |
| 4 | HEAD | 40A | Headlights |
| 5 | PTC | – | – |
| 6 | GLOW | – | – |
| 7 | ABS 1 | 30A | ABS*, DSC* |
| 8 | ABS 2 | 20A | ABS*, DSC* |
| 9 | ENGINE | 30A | For protection of various circuits |
| 10 | – | – | – |
| 11 | IG KEY 1 | 30A | Ignition switch |
| 12 | STARTER | 20A | Starter clutch |
| 13 | IG KEY 2 | 30A | Ignition switch |
| 14 | GLOW 1 | – | – |
| 15 | HEATER | 40A | Blower motor |
| 16 | GLOW 2 | – | – |
| 17 | DEFOG | 40A | Rear window defroster |
| 18 | AUDIO | 30A | Audio system (BOSE Sound System-equipped model) |
| 19 | ABS IG | 10A | ABS*, DSC* |
| 20 | FOG | 15A | Front fog lights* |
| 21 | HORN | 15A | Horn |
| 22 | DRL | 10A | DRL* |
| 23 | H/CLEAN | – | – |
| 24 | F/PUMP | 15A | Fuel pump |
| 25 | P/ST IG | 10A | Power steering |
| 26 | A/C MAG | 10A | Air conditioner* |
| 27 | ALT/TCM | 10A/15A | TCM* |
| 28 | GLOW SIG | – | – |
| 29 | P.OUTLET | – | Power outlet |
| 30 | ENG +B | 10A | PCM |
| 31 | ROOM | 15A | Interior lights |
| 32 | ENG BAR 4 | 10A | O2 sensors* |
| 33 | ENG BAR 3 | 10A | O2 sensors |
| 34 | EGI INJ | 10A | Injector |
| 35 | ENG BAR 1 | 10A | For protection of various circuits |
| 36 | ENG BAR 2 | 10A | PCM, Fuel pump |
With turbocharger
| Fuse or relay number | Description | Fuse amp rating | Protected Components |
|---|---|---|---|
| 1 | FAN | 70A | Cooling fan |
| 2 | – | – | – |
| 3 | BTN | 40A | For the protection of various circuits |
| 4 | HEAD | 40A | Headlights |
| 5 | F/PUMP | 30A | Fuel pump |
| 6 | – | – | – |
| 7 | ABS 1 | 30A | ABS, DSC |
| 8 | ABS 2 | 20A | ABS, DSC |
| 9 | ENGINE | 30A | For the protection of various circuits |
| 10 | INJECTOR | 30A | Fuel injector |
| 11 | IG KEY 1 | 30A | Ignition switch |
| 12 | STATER | 20A | Starter clutch |
| 13 | IG KEY2 | 30A | Ignition switch |
| 14 | – | – | – |
| 15 | HEATER | 40A | Blower motor |
| 16 | – | – | – |
| 17 | DEFOG | 40A | Rear window deforester |
| 18 | AUDIO | 30A | Audio system (BOSE Sound System-equipped model) |
| 19 | ABS IG | 10A | ABS |
| 20 | FOG | 15A | Front fog lights |
| 21 | HORN | 15A | Horn |
| 22 | DRL | 10A | DRL* |
| 23 | H/CLEAN | – | – |
| 24 | ETC | 10A | Elec, throttle valve |
| 25 | – | – | – |
| 26 | A/C MAG | 10A | Air conditioner |
| 27 | – | – | – |
| 28 | – | – | – |
| 29 | P.OUTLET | 15A | Power outlet |
| 30 | ENG +B | 10A | PCM |
| 31 | ROOM | 15A | Interior lights |
| 32 | – | – | – |
| 33 | ENG BAR 3 | 10A | O2 sensors |
| 34 | – | – | – |
| 35 | ENG BAR 1 | 15A | For protection of various circuits |
| 36 | ENG BAR 2 | 10A | PCM, Fuel pump |
Fuse block (Passenger’s side)
| Fuse or relay number | Descreption | Fuse amp rating | Protected Components |
|---|---|---|---|
| 37 | D/LOCK 2 | 15A | Double locking system* |
| 38 | STOP LAMP/HORN | 10A | Stop Lamp, Horn |
| 39 | HEAD HIGH L | 10A | Headlight high beam (LH) |
| 40 | HEAD HIGH R | 10A | Headlight high beam (RH) |
| 41 | – | – | – |
| 42 | – | – | – |
| 43 | CIGAR | 15A | Lighter |
| 44 | RADIO | 7.5A | Audio system |
| 45 | MIRROR | 10A | Power control mirror* |
| 46 | TAIL R | 7.5A | Taillight (RH), Parking light (RH), License plate lights |
| 47 | OBD | 10A | For protection of various circuits |
| 48 | – | – | – |
| 49 | TR/LOCK | – | – |
| 50 | – | – | – |
| 51 | – | – | – |
| 52 | SUN ROOF | 20A | Moonroof* |
| 53 | WASHER | 20A | Windshield wiper and washer |
| 54 | – | – | – |
| 55 | P/WIND R | – | – |
| 56 | P/WIND L | – | – |
| 57 | ALARM | – | – |
| 58 | M/DEF | 7.5A | Mirror Defroster* |
| 59 | – | – | – |
| 60 | HEAD LOW R | 15A | Headlight low beam (RH), Headlight leveling |
| 61 | HEAD LOW L | 15A | Headlight low beam (LH) |
| 62 | – | – | – |
| 63 | – | – | – |
| 64 | – | – | – |
| 65 | SAS | 10A | Supplemental restraint system |
| 66 | METER | 10A | Instrument cluster, Immobilizer system |
| 67 | IGNITION | 20A | ABS*, DSC*, Power steering |
| 68 | WIPER | 20A | Windshield wiper and washer |
| 69 | ENGINE | 20A | For the protection of various circuits |
| 70 | IG SIG | 10A | Auto wiper*, Power window switch* |
| 71 | SAS 2 | 7.5A | Seat weight sensor |
| 72 | – | – | – |
| 73 | – | – | – |
| 74 | SEAT WARM | 20A | Seat wanner* |
| 75 | D/LOCK 1 | 25A | Power door lock* |
| 76 | A/C | 10A | Air conditioner*, Heater control unit |
| 77 | P/WIND L | 30A | Power window (LH)* |
| 78 | P/WIND R | 30A | Power window (RH)* |
| 79 | BACK | 10A | Reverse lights |
| 80 | SUN ROOF | 7.5A | Moonroof* |
| 81 | TAILL | 7.5A | Taillight (LH), Parking light (LH) |
| 82 | ILLUMI | 7.5A | Illumination |
| 83 | – | – | – |
| 84 | – | – | – |
| 85 | – | – | – |
| 86 | – | – | – |
Next Post : How to read a car fuse box diagram? 5 Easy Steps
Frequently Asked Questions (FAQs)
Where are the fuse boxes located in a 2007 Mazda 3?
The 2007 Mazda 3 has two main fuse boxes:
Engine Compartment Fuse Box: Located under the hood, typically on the driver’s side near the battery or air intake box. This panel contains fuses and relays for the engine, cooling fans, headlights, and other major exterior systems.
Passenger Compartment Fuse Panel (Cabin Fuse Box): Located inside the cabin, usually under the dashboard on the driver’s side. It is often hidden behind a small removable plastic panel near the lower steering column or footrest area. This panel controls accessories, radio, power windows, and interior lights.
Where can I find the fuse diagram/chart for my 2007 Mazda 3?
The diagram is not typically printed on a single sheet but is generally found in two places:
On the inside of the fuse box covers (both the engine compartment and cabin panels).
In the owner’s manual (look under the “Fuses” or “Electrical System” section).
My cigarette lighter / 12V accessory socket is not working. Which fuse is it?
This is a very common issue caused by overloading the socket.
Fuse Location: Check the Passenger Compartment Fuse Panel (Cabin Box).
Fuse Type: Look for a 15 Amp (Lt. Blue) fuse labeled “CIGAR,” “P. POINT,” or “ACC.”
The power windows or sunroof have stopped working. Which fuse controls them?
These are protected by fuses in the Passenger Compartment Fuse Panel.
Fuse Type: The window circuits often use 20 Amp (Yellow) fuses, sometimes labeled “PWR WINDOW” or “SUNROOF.”
My radio/display screen suddenly went blank or won’t turn on. Which fuse should I check?
Check the low-amperage fuses in the Passenger Compartment Fuse Panel that control the audio and display units.
Fuse Type: Look for fuses labeled “AUDIO,” “RADIO,” or “ROOM” (often 10 Amp or 15 Amp).
One of my headlights or tail lights has stopped working. Could it be a fuse?
Yes. The lighting circuits are protected by fuses and relays in the Engine Compartment Fuse Box.
Fuse Type: Check the fuses labeled “H/LP LO” or “H/LP HI” (High/Low Beam) and “TAIL.” They are typically 10 Amp (Red) or 15 Amp (Lt. Blue) fuses.
My cooling fans aren’t turning on, causing the engine to overheat. Which fuse/relay is it?
The cooling fans are controlled by a high-amperage circuit.
Location: Check the large fuses and relays in the Engine Compartment Fuse Box labeled “RADIATOR FAN” or “COOLING FAN”. If the fuse is blown, the underlying issue might be a failed fan motor or a bad temperature sensor.
My engine cranks but won’t start. Where is the fuse for the fuel pump?
The fuel pump circuit is located in the Engine Compartment Fuse Box.
Location: Check the fuse and relay labeled “FUEL PUMP” or “PUMP”. This is a critical circuit; if the fuse is blown, the relay or the pump itself may need inspection.