2004 to 2008 Mazda 3 Fuse Box Diagram and Location Guide

The Mazda 3 has a fuse box that controls various electrical components. The 2004 to 2008 Mazda 3 models have the fuse box in the engine bay, near the battery. To ensure the proper functioning of the electrical system, it is important to have a clear understanding of the fuse box diagram and the location of each fuse. This information is essential for troubleshooting electrical issues, replacing a blown fuse, and performing regular maintenance on your Mazda 3.

The fuses are located in two places.

• The first set of fuses is located in the engine bay.
• The second fuse is above the passenger footwell, right underneath the dash.

Engine bay

The layout of fuses that you will find under the hood of the Mazda 3 Fuse Layout Fuses and ampere rating

Earlier Models	Latter Models
1 Cooling Fan	1 FAN
2 EHPAS	2 P/ST
3 Various circuits	3 BTN
4 Headlights	4 HEAD
5 *	5 <PTC>
6 *	6 [P.SEAT] <GLOW>
7 ABS	7 [ABS 1]
8 ABS	8 [ABS 2]
9 For the protection of various circuits	9 ENGINE
10 *	10 *
11 Ignition Switch	11 IG KEY 1
12 Starter Clutch	12 STARTER
13 Ignition Switch	13 IG KEY 2
14 *	14 <GLOW 1>
15 Blower motor (heater)	15 HEATER
16 *	16 <GLOW 2>
17 Rear Defroster	17 DEFOG
18 *	18 [AUDIO]
19 ABS	19 [ABS IG]
20 Fog Lights	20 [FOG]
21 Horn	21 HORN
22 *	22 [DRL]
23 H/Clean	23 <H/CLEAN>
24 Fuel Pump	24 F/PUMP
25 Power Steering	25 P/ST IG
26 Air Conditioner	26 A/C MAG
27 ALT	27 [TCM] <ALT>
28 *	28 <GLOW SIG>
29 *	29 P.OUTLET
30 PCM	30 ENG +B
31 Interior Lights	31 ROOM
32 O2 Heater	32 [ENG BAR 4]
33 O2 Heater	33 ENG BAR 3
34 Injector	34 EGI INJ
35 Air Flow Sensor	35 ENG BAR 1
36 EGR Control Valve

Interior Fuses

It is located inside the car, on the passenger side, under the dash, and above the passenger footwell. Remove the fuse box cover by shifting the two tabs. Twist the tab shown above and pull down on the fuse panel.

Earlier Models	Latter Models
37 Power door locks	37 [D/LOCK 2]
38 *	38 STOP LAMP/HORN
39 Headlight high beams (LH)	39 HEAD HIGH L
40 Headlight high beams (RH)	40 HEAD HIGH R
41 *	41 *
42 *	42 *
43 Lighter	43 CIGAR
44 Audio System	44 RADIO
45 Power Mirror	45 [MIRROR]
46 Tailight (RH), Parking Lights (RH), License Plate Lights	46 TAIL R
47 For the protection of various circuits (OBD)	47 OBD
48 *	48 *
49 TR/Lock	49 [TR/LOCK]
50 Control Unit	50 *
51 Turn Signals, Hazards	51 *
52 Moonroof	52 [SUN ROOF]
53 Front Washer, Rear window wiper, and washer	53 WASHER
54 *	54 *
55 Right Power window	55 <P/WIND R>
56 Left Power window	56 <P/WIND L>
57 Alarm	57 <ALARM>
58 Mirror Defroster	58 [M/DEF]
59 *	59 *
60 Headlight Low beams (RH)	60 HEAD LOW R
61 Headlight Low beams (LH)	61 HEAD LOW L
62 *	62 *
63 *	63 *
64 *	64 *
65 Supplemental Restraint System	65 SAS
66 Instrument Cluster, Immobilizer system, Shift Lock system	66 METER
67 ABS, EHPAS (Ignition)	67 IGNITION
68 Windshield Wiper	68 WIPER
69 Engine For the protection of various circuits	69 ENGINE
70 Auto Wiper	70 [IG SIG]
71 Supplemental Restraint System	71 SAS 2
72 *	72 *
73 *	73 *
74 Seat Warmer	74 [SEAT WARM]
75 Power door locks	75 [D/LOCK 1]
76 AC	76 A/C
77 Power Window (LH)	77 [P/WIND L]
78 Power Windows (RH)	78 [P/WIND R]
79 Reverse Lights	79 BACK
80 MoonRoof	80 [SUN ROOF]
81 Tailights (LH) Parking Lights (LH)	81 TAIL L
82 Illumination	82 ILLUMI

A blown fuse is one of the most common causes of a dead radio, a cigarette lighter socket that will not power anything, or lights that stop working on the Mazda 3. It is also one of the cheapest things to rule out before you start suspecting a bigger electrical fault.

If the new fuse blows again

Replacing a fuse that immediately blows a second time is a sign of a short circuit or an overloaded accessory on that line, not a faulty fuse. Fitting a higher amperage fuse will stop it blowing, but it also removes the protection for the wiring, and the wire becomes the weak point instead. Always use the rating shown in the charts above.

Check the simple causes first: an aftermarket stereo or dash camera wired into an existing circuit, a damaged connector, or moisture in a socket. Those account for most repeat failures on cars of this age.

If the fuse is intact and the component is still dead, the fault is further down the circuit at a relay, ground, switch or module. A full system scan reads the stored fault codes and tells you which circuit to follow rather than leaving you pulling fuses one by one.

Frequently Asked Questions

Which fuse is the cigarette lighter on a 2004 to 2008 Mazda 3?

The cigarette lighter is fuse 43 (CIGAR) in the interior fuse panel. The power outlet is fuse 29 (P.OUTLET) in the engine bay box.

Which fuse controls the fuel pump on the Mazda 3?

The fuel pump is fuse 24 (F/PUMP) in the engine bay fuse box. Check it if the engine cranks but will not start.

Why does my Mazda 3 radio not turn on?

Check fuse 44 (RADIO) in the interior panel and fuse 18 (AUDIO) in the engine bay. If both are good, check the connector and ground at the back of the radio.

More guides: browse all of our Mazda repair and troubleshooting guides.

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