2021 MAZDA MODEL 3 HATCHBACK warning light

Air intake selector switch
This switch controls the source of air
entering the vehicle.

Outside or recirculated air positions
can be selected. Press the switch to
select outside/recirculated air
positions.
Recirculated air position (indicator
light illuminated)
Outside air is shut off. Use this position
when going through tunnels, driving in
congested tra ffic (high engine exhaust
areas) or when quick cooling is
desired.
Outside air position (indicator light
turned off)
Outside air is allowed to enter the
cabin. Use this mode for ventilation or
windshield defrosting.
WARNING
Do not use the position (indicator
light turns on) in cold or rainy
weather:
Using the
position (indicator light
turns on) in cold or rainy weather is
dangerous as it will cause the windows
to fog up. Your vision will be
hampered, which could lead to a
serious accident.
Windshield de froster switch
Press the switch to defrost the
windshield and front door windows.
Refer to Windshield Defrosting and
Defogging on page 5-8.
Rear window defogger switch
Press the rear window defogger switch
to defrost the rear window.
Refer to Rear Window Defogger on
page 4-58.
▼Heating
1. Press the switch.
2. Set the air intake selector to the outside air position (indicator light
turns o ff).
3. Set the temperature control dial to
the hot position.
4. Set the fan control dial to the desired speed.
5. If dehumidi fied heating is desired,
turn on the air conditioner.
NOTE
If the windshield fogs up easily, press
the
switch.(With A/C switch)
If cooler air is desired at face level,
press the
switch and adjust the
temperature control dial to maintain
maximum comfort.
The air to the floor is warmer than air
to the face (except when the
temperature control dial is set at the
extreme hot or cold position).
Interior Features
Climate Control System
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▼Cooling (With A/C switch)
1. Press the switch.
2. Set the temperature control dial to the cold position.
3. Set the fan control dial to the desired speed.
4. Turn on the air conditioner by pressing the A/C switch.
5. After cooling begins, adjust the fan control dial and temperature
control dial as needed to maintain
maximum comfort.
CAUTION
If the air conditioner is used while
driving up long hills or in heavy tra ffic,
monitor the high engine coolant
temperature warning indication to see
if it is displayed (page 7-29).
The air conditioner may cause engine
overheating. If the warning indication
is displayed, turn the air conditioner
o ff (page 7-21).
NOTE
When maximum cooling is desired,
set the temperature control dial to
the extreme cold position and set
the air intake selector to the
recirculated air position, then turn
the fan control dial fully clockwise.
If warmer air is desired at floor level,
press the
switch and adjust the
temperature control dial to maintain
maximum comfort.
The air to the floor is warmer than air
to the face (except when the
temperature control dial is set at the
extreme hot or cold position).
▼ Ve n t i l a t i o n
1. Press the switch.
2. Set the air intake selector to the outside air position (indicator light
turns off ).
3. Set the temperature control dial to the desired position.
4. Set the fan control dial to the desired speed.
▼Windshield Defrosting and
Defogging
1. Press the switch.
2. Set the temperature control dial to the desired position.
3. Set the fan control dial to the desired speed.
4. If dehumidi fied heating is desired,
turn on the air conditioner.
WARNING
Do not defog the windshield using the
switch with the temperature
control set to the cold position:
Using the
switch with the
temperature control set to the cold
position is dangerous as it will cause
the outside of the windshield to fog
up. Your vision will be hampered,
which could lead to a serious accident.
Set the temperature control to the hot
or warm position when using the
switch.
NOTE
(With A/C switch)
Fogging on the windows clears up
more easily while the air conditioner
is on, but they will fog up more easily
if the air conditioner is turned o ff.
Interior Features
Climate Control System
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A/C switch
Pressing the A/C switch while the
AUTO switch is turned on will turn off
the air conditioner (cooling/
dehumidifying functions).
The on/off of the air conditioner
switches each time the A/C switch is
pressed.
NOTE
The air conditioner operates when
the A/C switch is pressed while the
air conditioner is turned o ff.
The air conditione r may not function
when the outside temperature
approaches 0 °C (32 °F).
Air intake selector switch
Outside or recircu lated air positions
can be selected. Press the switch to
select outside/recirculated air
positions.
Recirculated air position (
)
Outside air is shut o ff. Use this position
when going through tunnels, driving in
congested tra ffic (high engine exhaust
areas) or when quick cooling is
desired.
Outside air position (
)
Outside air is allowed to enter the
cabin. Use this mode for ventilation or
windshield defrosting.
WARNING
Do not recirculate the air in the cabin
during cold or rainy weather:
Recirculating the air in the cabin during
cold and rainy weather is dangerous as
it will cause the windows to fog up.
Your vision will be hampered, which
could lead to a serious accident.
SYNC (Synchronized Temperature)
switch
Use the SYNC switch to change the
mode between the individual
operation (driver and passenger) and
interconnection (simultaneous)
modes.
Interconnection mode (indicator light
turns on)
The set temperature for the driver and
front passenger is controlled
simultaneously.
Individual operation mode (indicator
light turns off)
The set temperature can be controlled
individually for the driver and front
passenger.
Windshield defroster switch
Press the switch to defrost the
windshield and front door windows.
Refer to Windshield Defrosting and
Defogging on page 5-13.
Rear window defogger switch
Press the rear window defogger switch
to defrost the rear window.
Refer to Rear Window Defogger on
page 4-58.
Interior Features
Climate Control System
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Depending on the device connected
to the accessory socket, the vehicle's
electrical system may be aff ected,
which could cause the warning light
to illuminate. Disconnect the
connected device and make sure
that the problem is resolved. If the
problem is resolved, disconnect the
device from the socket and switch
the ignition o ff. If the problem is not
resolved, consult an Authorized
Mazda Dealer.
NOTE
To prevent discharging of the battery,
do not use the socket for long periods
with the engine o ff or idling.
Connecting the accessory socket
1. Open the lid.
2. Pass the connection plug cord through the cutout of the console
and insert the plug into the
accessory socket.

1. Plug
Cup Holder
▼ Cup Holder
WARNING
Never use a cup holder to hold hot
liquids while the vehicle is moving:
Using a cup holder to hold hot liquids
while the vehicle is moving is
dangerous. If the contents spill, you
could be scalded.
Do not put anything other than cups
or drink cans in cup holders:
Putting objects other than cups or
drink cans in a cup holder is
dangerous.
During sudden braking or
maneuvering, occupants could be hit
and injured, or objects could be
thrown around the vehicle, causing
interference with the driver and the
possibility of an accident. Only use a
cup holder for cups or drink cans.
Interior Features
Interior Equipment
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Rear Coat Hooks
▼Rear Coat Hooks
WARNING
Never hang heavy or sharp objects on
the assist grips and coat hooks:
Hanging heavy or sharp-ended objects
such as a coat hanger from the assist
grips or coat hooks is dangerous as
they can
fly o ff and hit an occupant in
the cabin if a curtain air bag was to
deploy, which could result in serious
injury or death.
Always hang clothes on the coat hooks
and the assist grips without hangers.
Storage Compartments
▼ Storage Compartments
WARNING
Keep storage boxes closed when
driving:
Driving with the storage boxes open is
dangerous. To reduce the possibility of
injury in an accident or a sudden stop,
keep the storage boxes closed when
driving.
When loading cargo, make sure that it
is completely secured:
If the cargo is not completely secured,
it may move or collapse while driving
or during sudden braking , resulting in
injury or an accident.
Do not put articles in storage spaces
with no lid:
Putting articles in storage spaces with
no lid is dangerous as they could be
thrown around the cabin during
sudden braking , maneuvering, or
acceleration and cause an accident
depending on how the article is stored.
CAUTION
Do not leave lighters or eyeglasses in
the storage boxes while parked under
the sun. A lighter could explode or the
plastic material in eyeglasses could
deform and crack from high
temperature.
Interior Features
Interior Equipment
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▼Inspecting Engine Oil Level
NOTE
If the engine oil level warning
indication/warning light turns on,
add 1 L (0.26 US gal, 0.22 Imp gal)
of engine oil.
1. Be sure the vehicle is on a level surface.
2. Warm up the engine to normal
operating temperature.
3. Turn it o ff and wait at least 5
minutes for the oil to return to the
oil pan.
4. Pull out the dipstick, wipe it clean,
and reinsert it fully.

1. MAX
2. OK
3. MIN

5. Pull it out again and examine thelevel.
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 over fill 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.
Maintenance and Care
Owner Maintenance
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▼Replacing a Wheel
WARNING
Always use wheels of the correct size
on your vehicle:
Using a wrong-sized wheel is
dangerous. Braking and handling could
be a
ffected, leading to loss of control
and an accident.
CAUTION
A wrong-sized wheel may adversely
a ff ect:
 Tire fit
 Wheel and bearing life
 Ground clearance
 Snow-chain clearance
 Speedometer calibration
 Headlight aim
 Bumper height
 Tire Pressure Monitoring System
NOTE
When replacing a wheel, make sure
the new one is the same as the
original factory wheel in diameter,
rim width, and o ffset (inset/outset).
For details, contact an Authorized
Mazda Dealer.

Proper tire balancing provides the best
riding comfort and helps reduce tread
wear. Out-of-balance tires can cause
vibration and uneven wear, such as
cupping and flat spots.
Light Bulbs
▼ Light Bulbs
Front
Ty p e A
1. Vanity mirror lights*
2. Overhead lights/ Front map lights
3. Side turn signal lights*
4. Front side-marker lights
5. Parking lights
6. Headlights (High/Low beam)/
Daytime running lights
7. Front turn signal lights
Ty p e B
1. Vanity mirror lights*
2. Overhead lights/ Front map lights
3. Side turn signal lights*
4. Parking lights/Front side-marker
lights
5. Headlights (High/Low beam)/ Daytime running lights
6. Front turn signal lights
Maintenance and Care
Owner Maintenance
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Pay special attention to removing salt,
dirt, mud, and other foreign material
from the underside of the fenders, and
make sure the drain holes in the lower
edges of the doors and rocker panels
are clean.

Insects, tar, tree sap, bird droppings,
industrial fallout, and similar deposits
can damage the finish if not removed
immediately. When prompt washing
with plain water is ineffective, use a
mild soap made for use on vehicles.

Thoroughly rinse o ff all soap with
lukewarm or cold water. Do not allow
soap to dry on the finish.

After washing the vehicle, dry it with a
clean chamois to prevent water spots
from forming.
WARNING
Dry o ff brakes that have become wet
by driving slowly, releasing the
accelerator pedal and lightly applying
the brakes several times until the
brake performance returns to normal:
Driving with wet brakes is dangerous.
Increased stopping distance or the
vehicle pulling to one side when
braking could result in a serious
accident. Light braking will indicate
whether the brakes have been
a ff ected.
When using an automatic car wash
Retract the door mirrors.The automatic car wash brushes
could reduce the paint lustre or
hasten paint deterioration.
When using a high water pressure car
wash
High water temperature and high
water pressure car washers are
available depending on the type of car
wash machine. If the car washer nozzle
is put too close to the vehicle, the
force of the spray could damage or
deform the molding , aff ect the
sealability of parts, and allow water to
penetrate the interior. Keep a su fficient
space (30 cm (12 in) or more)
between the nozzle and the vehicle. In
addition, do not spend too much time
spraying the same area of the vehicle,
and be very careful when spraying
between gaps in doors and around
windows.
Waxing
Your vehicle needs to be waxed when
water no longer beads on the finish.
Always wash and dry the vehicle before
waxing it. In addition to the vehicle
body, wax the metal trim to maintain
its luster.

1. Use wax which contains no abrasives.
Wax containing abrasives will
remove paints and could damage
bright metal parts.
2. Use a good grade of natural wax for metallic, mica, and solid colors.
3. When waxing, coat evenly with the sponge supplied or a soft cloth.
4. Wipe o ff the wax with a soft cloth.
NOTE
A spot remover to remove oil, tar, and
similar materials will usually also take
o ff the wax. Rewax these areas even if
the rest of the vehicle does not need it.
Maintenance and Care
Appearance Care
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