2021 MAZDA MODEL CX-3 Owners Manual

Fuel and Engine Exhaust Precautions
▼Fuel Requirements
Vehicles with catalytic converters or oxygen sensors must use ONLY UNLEADED FUEL,
which will reduce exhaust emissions and keep spark plug fouling to a minimum.

To achieve maximum engine performance, use the specified fuel.
Fuel
Octane Rating*1 (Anti-knock index)
Regular unleaded fuel 87 [(R+M)/2 method] or above (91 RON or above)
*1 U.S. federal law requires that octane ratings be posted on gas station pumps.
Fuel with a rating lower than 87 octane (91 R ON) will negatively affect the emission control
system performance and could also cause engine knocking and serious engine damage.
CAUTION
USE ONLY UNLEADED FUEL.
Leaded fuel is harmful to the catalytic co nverter and oxygen sensors and will lead to
deterioration of the emission control system and or failures.
 This vehicle can only use oxygenated fuels containing no more than 10 % ethanol by
volume. Damage to the vehicle may occur when ethanol exceeds this recommendation, or
if the gasoline contains any methanol. Stop us ing gasohol of any kind if your vehicle engine
is performing poorly.
 Never add fuel system additives other than a Mazda genuine product, otherwise the
emission control system could be damaged. Consult an Authorized Mazda Dealer for
details.
Gasoline blended with oxygenates such as alcohol or ether compounds are generally
referred to as oxygenated fuels. The common gasoline blend that can be used with your
vehicle is ethanol blended at no more than 10 %. Gasoline containing alcohol, such as
ethanol or methanol, may be marketed under the name "Gasohol".

Vehicle damage and drivability problems resulting from the use of the following may not be
covered by the warranty.
Gasohol containing more than 10 % ethanol.
Gasoline or gasohol containing methanol.
Leaded fuel or leaded gasohol.
Before Driving
Fuel and Emission
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▼Emission Control System
This vehicle is equipped with an emission con
trol system (the catalytic converter is part of
this system) that enables the vehicle to comply with existing exhaust emissions
requirements.
WA R N I N G
Never park over or near anything flammable:
Parking over or near anything flammable, such as dry grass, is dangerous. Even with the
engine turned off, the exhaust system remains very hot after normal use and could ignite
anything flammable. A resulting fire could cause serious injury or death.
CAUTION
Ignoring the following precautions could cause le ad to accumulate on the catalyst inside the
converter or cause the converter to get very ho t. Either condition will damage the converter
and cause poor performance.
 USE ONLY UNLEADED FUEL.
 Do not drive your Mazda with any sign of engine malfunction.
 Do not coast with the ignition switched off.
 Do not descend steep grades in gear with the ignition switched
off.
 Do not operate the engine at hi gh idle for more than 2 minutes.
 Do not tamper with the emission control syst em. All inspections and adjustments must be
made by a qualified technician.
 Do not push-start or pull-start this vehicle.
NOTE
Under U.S. federal law, any modification to the original-equipment emission control
system before the first sale and registration of a vehicle is subject to penalties. In some
states, such modification made on a used vehicle is also subject to penalties.
While the engine is off, the sound of a valve opening and closing can be heard at the rear
of the vehicle, however this does not indicate an abnormality. The vehicle has a
self-checking device and it oper ates while the engine is off.
Before Driving
Fuel and Emission
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▼Engine Exhaust (Carbon monoxide)
WARNING
Do not drive your vehicle if you smell exhaust gas inside the vehicle:
Engine exhaust gas is dangerous. This gas contai
ns carbon monoxide (CO), which is colorless,
odorless, and poisonous. When inhaled, it can cause loss of consciousness and death. If you
smell exhaust gas inside the vehicle, keep al l windows fully open and contact an Authorized
Mazda Dealer immediately.
Do not run the engine when inside an enclosed area:
Running the engine inside an enclosed area, such as a garage, is dangerous. Exhaust gas,
which contains poisonous carbon monoxide , could easily enter the cabin. Loss of
consciousness or even death could occur.
Open the windows or adjust the heating or cooling system to draw fresh air when idling the
engine:
Exhaust gas is dangerous. When the vehicle is stopped with the windows closed and the
engine running for a long time even in an open area, exhaust gas, which contains poisonous
carbon monoxide, could enter the cabin. Loss of consciousness or even death could occur.
Clear snow from underneath and around your vehicle, particularly the tail pipe, before
starting the engine:
Running the engine when a vehicle is stopped in deep snow is dangerous. The exhaust pipe
could be blocked by the snow, allowing exhaus t gas to enter the cabin. Because exhaust gas
contains poisonous carbon monoxide, it could cause loss of consciousness or even death to
occupants in the cabin.
Before Driving
Fuel and Emission
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Fuel-Filler Lid and Cap
WA R N I N G
When removing the fuel-filler cap, loosen
the cap slightly and wait for any hissing to
stop, then remove it:
Fuel spray is dangerous. Fuel can burn skin
and eyes and cause illness if ingested. Fuel
spray is released when there is pressure in
the fuel tank and the fuel-filler cap is
removed too quickly.
Before refueling, stop the engine, and
always keep sparks and flames away from
the filler neck:
Fuel vapor is dangerous. It could be ignited
by sparks or flames causing serious burns
and injuries.
Additionally, use of the incorrect fuel-filler
cap or not using a fuel-filler cap may result
in a fuel leak, which could result in serious
burns or death in an accident.
Do not continue refueling after the fuel
pump nozzle shuts off automatically:
Continuing to add fuel after the fuel pump
nozzle has shut off automatically is
dangerous because overfilling the fuel tank
may cause fuel overflow or leakage. Fuel
overflow and leakage could damage the
vehicle and if the fuel ignites it could cause
a fire and explosion resulting in serious
injury or death.
CAUTION
Always use only a genuine Mazda fuel-filler
cap or an approved equivalent, available
at an Authorized Mazda Dealer. The wrong
cap can result in a serious malfunction of
the fuel and emission control systems.
(U.S.A. and Canada)
It may also cause the check engine light in
the instrument cluster to illuminate.
▼ Refueling
Before refueling, close all the doors,
windows, and the liftg
ate, and switch the
ignition OFF.
1. To open the fuel-filler lid, pull the remote fuel-filler lid release.

Remote fuel-filler lid release
2. To remove the fuel-filler cap, turn itcounterclockwise.
Before Driving
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3. Attach the removed cap to the innerside of the fuel-filler lid.

Fuel-filler lid
Fuel-filler cap
4. Insert the refueling nozzle all the way
and begin refueling. Pull out the
refueling nozzle after the refueling
stops automatically.
5. To close the fuel-filler cap, turn it clockwise until a click is heard.
6. To close, press the fuel-filler lid until it locks securely.

CAUTION
(U.S.A. and Canada)
If the check fuel cap warning light
illuminates, the fuel-filler cap may not be
properly installed. If the warning light
illuminates, park your vehicle safely off the
right-of-way, remove th e fuel-filler cap and
reinstall it correctly. After the cap has been
correctly installed, the fuel cap warning
light may continue to illuminate until a
number of driving cycles have been
completed. A drive cycle consists of starting
the engine (after four or more hours with
the engine off) and driving the vehicle on
city and highway roads.
Continuing to drive with the check fuel cap
warning light illuminated could cause the
check engine light to illuminate as well.
Before Driving
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Mirrors
Before driving, adjust the inside and
outside mirrors.
▼ Outside Mirrors
WA R N I N G
Be sure to look over your shoulder before
changing lanes:
Changing lanes without taking into
account the actual distance of the vehicle
in the convex mirror is dangerous. You
could have a serious accident. What you
see in the convex mirror is closer than it
appears.
Mirror type
Flat type (driver's side)
Flat surface mirror.
Convex type (front passenger side)
The mirror has single curvature on its
surface.
Power mirror adjustment
The ignition must be switched to ACC or
ON position.

To a d j u s t :
1. Rotate the mirror switch to the left
or
right
to choose the left or right side
mirror.
2. Press the mirror switch in the
appropriate direction.
Center position
Mirror switch
After adjusting the mirror, lock the control
by rotating the switch in the center
position.
Folding mirror
WA R N I N G
Always return the outside mirrors to the
driving position before you start driving:
Driving with the outsid e mirrors folded in is
dangerous. Your re ar view will be
restricted, and you could have an accident.
Manually fold the outside mirror rearward
until it is flush with the vehicle.
Before Driving
Mirrors
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▼Rearview Mirror
WARNING
Do not stack cargo or objects higher than
the seatbacks:
Cargo stacked higher than the seatbacks is
dangerous. It can block your view in the
rearview mirror, which might cause you to
hit another car when changing lanes.
Rearview mirror adjustment
Before driving, adjust
the rearview mirror
to center on the scene through the rear
window.

NOTE
For the manual day/night mirror, perform
the adjustment with the day/night lever in
the day position.
Reducing glare from headlights
Manual day/night mirror
Push the day/night lever forward for day
driving. Pull it back to reduce glare of
headlights from vehicles at the rear.

Day/Night lever
Day
Night
Auto-dimming mirror
The auto-dimming mirror automatically
reduces the glare of headlights from
vehicles at the rear when the ignition is
switched ON.
NOTE
Do not use glass cleaner or suspend
objects on or around the light sensor.
Otherwise, light sensor sensitivity will
be affected and may not operate
normally.

Light sensor
The auto-dimming function is canceled
when the ignition is switched ON and
the selector lever is in the R position.
Before Driving
Mirrors
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Power Windows
The windows can be opened/closed by operating the power window switches.
WA R N I N G
Make sure the opening is clear before closing a window:
Closing a power window is dangerous. A person's hands, head, or even neck could be caught
by the window and result in serious injury or even death. This warning applies especially to
children.
Never allow children to play with power window switches:
Power window switches that are not locked wi th the power window lock switch would allow
children to operate power windows unintentionally, which could result in serious injury if a
child's hands, head or neck becomes caught by the window.
Make sure nothing blocks the window just before it reaches the fully closed position or while
holding up the power window switch:
Blocking the power window just before it reache s the fully closed position or while holding up
the power window switch is dangerous.
In this case, the jam-safe function cannot prevent the window from closing all the way. If
fingers are caught, seriou s injuries could occur.
NOTE
When driving with only 1 of the rear windows open, your ears might experience a
resonating sound. However, this does not indicate a problem. The sound can be reduced by
slightly opening a front window or by ch anging the size of the rear window opening.
▼Opening/Closing Windows
The window opens while the switch is pressed and it closes while the switch is pulled up
with the ignition switched ON. Do not open or
close three or more windows at the same
time.
Before Driving
Windows
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