Page 456 of 618

▼Vehicle Engine Control Unit Reset Procedure
NOTE
This procedure is intended for vehicles with
the engine oil flexible maintenance setting
selected.
After replacing the engine oil, have a repa ir shop such as an Authorized Mazda Dealer
perform the initialization (engine oil data rese tting) of the recorded value. If the value
recorded by the computer is not initialized, the wrench indicator light may not turn off or it
may turn on earlier than normal.
NOTE
The initialization (engine oil data resetting) of the recorded value can be performed using
the following procedure:
1. Switch the ignition OFF.
2. Switch the ignition ON with the selector pressed and continue pressing the selector for
about 5 seconds until the master warning light
flashes.
Selector
3. After the master warning light flashes for several seconds, the initialization is
completed.
▼ Inspecting Engine Oil Level
1. Be sure the vehicle is on a level
surface.
2. Warm up the engine to normal operating temperature.
3. Turn it off and wait at least 5 minutes
for the oil to return to the oil pan.
Maintenance and Care
Owner Maintenance
6-24
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00
Page 457 of 618

4. Pull out the dipstick, wipe it clean, andreinsert it fully.
MAX
MIN OK
5. Pull it out again and examine the level.
The level is normal if it is between the
MIN and MAX marks.
If it is near or below MIN, add enough
oil to bring the level to MAX.
CAUTION
Do not overfill the engine oil. This may
cause engine damage.
6. Make sure the O-ring on the dipstick is positioned properly before reinserting
the dipstick.
7. Reinsert the dipstick fully.
Engine Coolant
▼ Inspecting Coolant Level
WA R N I N G
Do not use a match or live flame in the
engine compartment. DO NOT ADD
COOLANT WHEN THE ENGINE IS HOT:
A hot engine is dangerous. If the engine has
been running, parts of the engine
compartment can become very hot. You
could be burned. Carefully inspect the
engine coolant in the coolant reservoir, but
do not open it.
Pull over to a safe location, then switch
the ignition off and make sure the fan is
not running before attempting to work
near the cooling fan:
Working near the cooling fan when it is
running is dangerous. The fan could
continue running indefinitely even if the
engine has stopped and the engine
compartment temperature is high. You
could be hit by the fan and seriously
injured.
Do not remove either cooling
system cap when the engine and radiator
are hot:
When the engine and radiator are hot,
scalding coolant and steam may shoot out
under pressure and cause serious injury.
Maintenance and Care
Owner Maintenance
6-25
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00
Page 461 of 618

Wiper Blades
CAUTION
Hot waxes applied by automatic car
washers have been known to affect the
wiper's ability to clean windows.
To prevent damage to the wiper blades,
do not use gasoline, kerosene, paint
thinner, or other solvents on or near
them.
When the wiper lever is in the AUTO
position and the ignition is switched ON,
the wipers may move automatically in
the following cases:
If the windshield above the rain sensor
is touched.
If the windshield above the rain sensor
is wiped with a cloth.
If the windshield is struck with a hand
or other object.
If the rain sensor is struck with a hand
or other object from inside the vehicle.
Be careful not to pinch hands or fingers
as it may cause injury, or damage the
wipers. When washing or servicing the
vehicle, make sure the wiper lever is in
the OFF position.
Contamination of eith er the windshield or
the blades with foreign matter can reduce
wiper effectiveness. Common sources are
insects, tree sap, and hot wax treatments
used by some commercial car washes.
If the blades are not wiping properly, clean
the window and blades with a good
cleaner or mild de tergent; then rinse
thoroughly with clean water. Repeat if
necessary.
▼ Replacing Windshield Wiper Blades
When the wipers no longer clean well, the
blades are probably worn or cracked.
Replace them.
CAUTION
To prevent damage to the wiper arms and
other components, do not try to sweep the
wiper arm by hand.
NOTE
When raising both windshield wiper arms,
raise the driver's side wiper arm first.
When lowering the wiper arms, slowly
lower the wiper arm from the passenger's
side first while supporting it with your
hand. Forcefully lowering the wiper arms
could damage the wiper arm and blade,
and may scratch or crack the windshield.
Replace the wiper blades using the
following procedure.
1. Raise the wiper arm.
2. Open the clip and slide the blade
assembly in the dire ction of the arrow.
Maintenance and Care
Owner Maintenance
6-29
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00
Page 473 of 618

WARNING
Never touch the glass portion of a halogen
bulb with your bare hands and always
wear eye protection when handling or
working around the bulbs:
When a halogen bulb breaks, it is
dangerous. These bulbs contain
pressurized gas. If one is broken, it will
explode and serious injuries could be
caused by the flying glass.
If the glass portion is touched with bare
hands, body oil could cause the bulb to
overheat and explode when lit.
Always keep halogen bulbs out of the reach
of children:
Playing with a halogen bulb is dangerous.
Serious injuries could be caused by
dropping a halogen bulb or breaking it
some other way.
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 flathead screwdriver
contacts the terminal, a short circuit may
occur.
NOTE
To replace the bulb, contact an
Authorized Mazda Dealer.
If the halogen bulb is accidentally
touched, it should be cleaned with
rubbing alcohol before being used.
Use the protective cover and carton for
the replacement bulb to dispose of the
old bulb promptly and out of the reach
of children.
▼Replacing Exterior Light Bulbs
Headlights (With LED headlights)
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.
Headlights/Daytime running lights
(With halogen headlights)
High-beams bulbs/Daytime running
lights
1. Make sure the ignition is switched off,
and the headlight switch is off.
2. Lift the hood.
3. Disconnect the connector from the unit by pressing the tab on the connector
with your finger and pulling the
connector downward.
4. Turn the socket and bulb assembly toremove it. Carefully remove the bulb
from its socket in the reflector by
Maintenance and Care
Owner Maintenance
6-41
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00
Page 474 of 618

gently pulling it straight backward out
of the socket.
5. Install the new bulb in the reverseorder of the removal procedure.
Low-beam bulbs
1. Make sure the ignition is switched off, and the headlight switch is off.
2. Lift the hood.
3. Disconnect the connector from the unit by pressing the tab on the connector
with your finger and pulling the
connector downward.
4. Turn the socket and bulb assembly toremove it. Carefully remove the bulb
from its socket in the reflector by
gently pulling it straight backward out
of the socket.
5. Install the new bulb in the reverse
order of the removal procedure.
Parking lights/Daytime running lights/
Front side-marker lights (With LED
headlights)
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.
Parking lights/Front side-marker lights
(With halogen headlights)
1. Make sure the ignition is switched off, and the headlight switch is off.
2. Turn the socket and bulb assembly counterclockwise and remove it.
Maintenance and Care
Owner Maintenance
6-42
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00
Page 475 of 618

3. Disconnect the bulb from the socket.
4. Install the new bulb in the reverseorder of the removal procedure.
Front turn signal lights
1. Make sure the ignition is switched off, and the headlight switch is off.
2. Turn the screw counterclockwise and remove it, and then partially peel back
the mudguard.
3. Turn the socket and bulb assembly
counterclockwise and remove it.
4. Disconnect the bulb from the socket.
5. Install the new bulb in the reverseorder of the removal procedure.
Fog lights
*, Side turn signal lights*,
Brake lights/Taillights (LED type), Rear
side-marker lights (LED type),Taillights
(LED type)*, High-mount brake light,
Reverse lights (LED type)
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.
Rear turn signal lights, Brake lights/
Taillights (Bulb type), Rear side-marker
lights (Bulb type)
1. Make sure the ignition is switched off, and the headlight switch is off.
Maintenance and Care
Owner Maintenance
*Some models.6-43
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00
Page 477 of 618

Reverse lights (Bulb type)
1. Make sure the ignition is switched off,and the headlight switch is off.
2. Remove the cover.
3. Turn the socket and bulb assembly
counterclockwise and remove it.
4. Disconnect the bulb from the socket.
5. Install the new bulb in the reverseorder of the removal procedure.
License plate lights
1. Make sure the ignition is switched off, and the headlight switch is off.
2. Remove the cover.
3. Turn the socket and bulb assemblycounterclockwise and remove it.
4. Disconnect the bulb from the socket.
5. Install the new bulb in the reverse
order of the removal procedure.
▼Replacing Interior Light Bulbs
Overhead lights (Front)/Map lights,
Overhead lights (Rear)
1. Wrap a small flathead screwdriver with
a soft cloth to prevent damage to the
lens, and then remove the lens by
carefully prying on the edge of the lens
with the flathead screwdriver.
2. Disconnect the bulb by pulling it out.
Maintenance and Care
Owner Maintenance
6-45
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00
Page 479 of 618

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 off.
2. Open the fuse panel cover.
3. Pull the fuse straight out with the fuse puller provided on the fuse block
located in the engine compartment.
4. Inspect the fuse and replace it if it isblown.
Normal 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 OUTLET 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.
Maintenance and Care
Owner Maintenance
6-47
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00