2021 MAZDA MODEL 3 HATCHBACK maintenance

Rear
4–Door
1. Trunk light
2. High-mount brake light
3. Overhead light (Rear)
4. Rear side-marker lights
5. Brake lights/Taillights
*
6. Rear turn signal lights
7. Brake lights/Taillights
8. Taillights
*
9. Reverse lights
10.License plate lights
5–Door
1. Luggage compartment light
2. High-mount brake light
3. Overhead light (Rear)
4. Rear side-marker lights
5. Rear turn signal lights
6. Brake lights/Taillights
7. Taillights
*
8. Reverse lights
9. License plate lights
CAUTION
When removing the lens or lamp unit
using a flathead screwdriver, make sure
that the flathead screwdriver does not
contact the interior terminal. If the
fl athead screwdriver contacts the
terminal, a short circuit may occur.
NOTE
When replacing a bulb, contact an
Authorized Mazda Dealer if
necessary.
Use the protective cover and carton
for the replacement bulb to dispose
of the old bulb promptly and out of
the reach of children.
For details regarding the installation
positions of the interior lights, refer
to the following:
Va n i t y m i r r o r l i g h t s
Refer to Vanity Mirrors on page
5-38.
Overhead Lights/front map lights,
overhead light (rear), trunk light,
and luggage compartment light
Refer to Interior Lights on page
5-39.
▼ Replacing Exterior Light Bulbs
The exterior lights have either LEDs or
normal bulbs.
Only the bulb for a
parking lights/front
side-marker lights (type B) can be
replaced.
LED type
HeadlightsDaytime running lightsParking lights (Type A)Front turn signal lightsFront side-marker lights (Type A)Side turn signal lights*
High-mount brake lightRear turn signal lights
Maintenance and Care
Owner Maintenance
6-38*Some models.
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

Rear side-marker lightsBrake lightsTa i l l i g h t sReverse lightsLicense plate lights
The LED bulb cannot be replaced as a
single unit because it is an integrated
unit.
The LED bulb has to be replaced with
the unit. We recommend an
Authorized Mazda Dealer when the
replacement is necessary.
Bulb type
Parking lights/Front side-marker
lights (Type B)
1. Make sure the ignition is switched off, and the headlight switch is o ff.
2. If you are changing the left bulb, start the engine, turn the steering
wheel all the way to the right, and
turn o ff engine. If you are changing
the right bulb, turn the steering
wheel to the left.
3. Pull the center of each plastic retainer and remove the retainers.
1. Removal
2. Installation

4. Pull the center of each plasticretainer and remove the retainers.
1. Removal
2. Installation

5. Turn the screw counterclockwise and remove it, and then partially
peel back the mudguard.
6. Turn the socket and bulb assemblycounterclockwise and remove it.
7. Disconnect the bulb from thesocket.
8. Install the new bulb in the reverse order of the removal procedure.
Maintenance and Care
Owner Maintenance
6-39
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▼Replacing Interior Light Bulbs
Overhead lights/Front map lights,
Overhead light (Rear), Vanity mirror
lights*, Luggage compartment light
(5–Door)
The LED bulb cannot be replaced as a
single unit because it is an integrated
unit.
The LED bulb has to be replaced with
the unit. We recommend an
Authorized Mazda Dealer when the
replacement is necessary.
Trunk light (4–Door)
1. Press both sides of the lens cap to
remove it.
2. Disconnect the bulb by pulling it out.

3. Install the new bulb in the reverse
order of the removal procedure.
Fuses
▼Fuses
Your vehicle's electrical system is
protected by fuses.

If any lights, accessories, or controls do
not work, inspect the appropriate
circuit protector. If a fuse has blown,
the inside element will be melted.

If the same fuse blows again, avoid
using that system and consult an
Authorized Mazda Dealer as soon as
possible.
▼Fuse Replacement
Replacing the fuses on the vehicle's
left side
If the electrical system does not work,
first inspect the fuses on the vehicle's
left side.

1. Make sure the ignition is switched
off, and other switches are o ff.
2. Open the fuse panel cover.
Maintenance and Care
Owner Maintenance
6-40*Some models.
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

3. Pull the fuse straight out with thefuse puller provided on the fuse
block located in the engine
compartment.
4. Inspect the fuse and replace it if it is
blown.
1. Normal
2. Blown

5. Insert a new fuse of the same
amperage rating , and make sure it
fits tightly. If it does not
fit tightly,
have an expert install it. Consult an
Authorized Mazda Dealer.
If you have no spare fuses, borrow
one of the same rating from a
circuit not essential to vehicle
operation, such as the audio or
accessory socket circuit.
CAUTION
Always replace a fuse with a
genuine Mazda fuse or equivalent
of the same rating. Otherwise, you
may damage the electric system.
6. Reinstall the cover and make sure that it is securely installed.
Replacing the fuses under the hood
If the headlights or other electrical
components do not work and the fuses
in the cabin are normal, inspect the
fuse block under the hood.
If a fuse is blown, it must be replaced.
Follow these steps:

1. Make sure the ignition is switched
off, and other switches are
off.
2. Remove the fuse block cover.
3. If any fuse but the MAIN fuse is blown, replace it with a new one of
the same amperage rating .
1. Normal
2. Blown

Maintenance and Care
Owner Maintenance
6-41
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WARNING
Do not replace the main fuse by
yourself. Have an Authorized
Mazda Dealer perform the
replacement:
Replacing the fuse by yourself is
dangerous because the MAIN fuse
is a high current fuse. Incorrect
replacement could cause an
electrical shock or a short circuit
resulting in a fire.
4. Reinstall the cover and make sure that it is securely installed.
Maintenance and Care
Owner Maintenance
6-42
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

▼Fuse Panel Description
Fuse block (Engine compartment)
No. FUSE RAT
-
ING PROTECTED COMPONENT
F1 ――
F2 20 A Windshield wiper de-icer
*
F330 A Engine control system
20 A
―
F4 20 A S -VT
F5 40 A Engine control system
F6 20 A ―
Maintenance and Care
Owner Maintenance
*Some models.6-43
Mazda3_8JM2-EA-20H_Edition1_new 2020-7-10 17:21:34

No.FUSE RAT
-
ING PROTECTED COMPONENT
F7 15 A
―
20 A Fuel pump
F8 15 A Engine control system
F9 15 A Transmission control system
*
F1015 A Engine control system
F11 7.5 A Air conditioner
F12 15 A Engine control system
F13 15 A ―
F14 20 A
Front seat warmer
*
F15 20 A ―
F16 15 A For protection of various circuits
F17 ――
F18 15 A For protection of various circuits
F19 60 A Power steering system
F20 15 A Headlight (LH) 1
F21 15 A Headlight (RH) 1
F22 15 A Keyless system
F23 30 A ABS, Dynamic stability control system
F24 15 A Headlight (LH) 2
F25 15 A Headlight (RH) 2
F26 7.5 A On board diagnostics
F27 25 A For protection of various circuits
F28 25 A For protection of various circuits
F29 15 A Windshield washer
F30 15 A Accessory sockets
F31 15 A Horn
F32 ――
F33 ――
F34 ――
F35 50A ABS, Dynamic stability control system
F36 ――
F37 40 A Rear window defogger
F38 50 A For protection of various circuits
Maintenance and Care
Owner Maintenance
6-44*Some models.
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

No.FUSE RAT
-
ING PROTECTED COMPONENT
F39 ――
F40 40 A Air conditioner
F41 ――
F42 20 A Windshield wipers
F43 30 A Cooling fan
F44 30 A Starter
F45 10 A Engine control system
F46 15 A Audio
F47 15 A For protection of various circuits
F48 7.5 A Air bag
F49 15 A Instrument cluster
F50 15 A Room light
F51 25 A Audio
F52 10 A
Moonroof
*
F53 15 A Engine control system
F54 15 A i-ACTIVSENSE
F55 50 A ―
F56 50 A
―
15 A Electric water pump
*
Maintenance and Care
Owner Maintenance
*Some models.6-45
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34