2021 MAZDA MODEL 3 HATCHBACK Owners Manual

Make sure luggage and cargo are
secured before driving:
Not securing cargo while driving is
dangerous as it could move or be
crushed during sudden braking or a
collision and cause injury.
CAUTION
Make sure the luggage compartment
cover is firmly secured. If it is not
firmly secured, it could unexpectedly
disengage resulting in injury.
The luggage compartment can be
accessed by opening the liftgate when
the straps are attached to the sides of
the liftgate.

Removing the luggage compartment
cover
This cover can be removed for more
room.
1. Remove the straps from the hooks.
2. Press the luggage compartment cover upward from near the pins
and remove the luggage
compartment cover from the pins.
1. Pin

3. Lift the front end of the luggage compartment cover and remove it.
Before Driving
Doors and Locks
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Inside Trunk ReleaseLever (4-door)
*
▼Inside Trunk Release Lever
Your vehicle is equipped with an inside
trunk release lever that provides a
means of escape for children and
adults in the event they become locked
inside the trunk.

No matter how careful adults might be
with keys and locking their cars,
parents should be aware that children
may be tempted to play around
vehicles and use the trunk as a hiding
place.

Adults are advised to familiarize
themselves with the operation and
location of the inside trunk release
lever so that all children can be told
about it in an appropriate way, keeping
in mind that most vehicles do not have
such levers.
WARNING
Close the trunk lid, be sure the seat
backs are latched and do not allow
children to play inside the vehicle:
Leaving the trunk lid open or leaving
children in the vehicle with the keys is
dangerous. Children could open the
trunk lid and climb inside resulting in
possible injury or death from heat
exposure.
Always keep the car from being a
tempting place to play by latching the
rear seats, doors and the trunk, and
keeping the keys where children can
not play with them:
Leaving children or animals unattended
in a parked vehicle is dangerous.
Babies left sleeping and children who
lock themselves in cars or trunks can
die very quickly from heat prostration.
Do not leave your children or pets
alone in a car at any time. Do not leave
the car, the rear folding seats or the
trunk unlocked.
▼
Opening the Trunk Lid from the
Inside
Slide the inside trunk release lever in
the direction of the arrow. The lever is
made of material that will glow for
hours in the darkness of the trunk
following a brief exposure to ambient
light.

The inside trunk release lever is located
on the inside of the trunk lid.
Before Driving
Doors and Locks
3-24*Some models.
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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 RON) will negatively a ffect the emission
control system performance and could al so cause engine knocking and serious
engine damage.
CAUTION
 USE ONLY UNLEADED FUEL.
Leaded fuel is harmful to the catalytic converter 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 cont ains any methanol. Stop using 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 comm on 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 control system (the catalytic
converter is part of this system) that
enables the vehicle to comply with
existing exhaust emissions
requirements.
WARNING
Never park over or near anything
fl
ammable:
Parking over or near anything
fl ammable, such as dry grass, is
dangerous. Even with the engine
turned o ff, 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 lead to accumulate on the
catalyst inside the converter or cause
the converter to get very hot. 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 o ff.
 Do not descend steep grades in gear
with the ignition switched o ff.
 Do not operate the engine at high
idle for more than 2 minutes.
 Do not tamper with the emission
control system. All inspections and
adjustments must be made by a
quali fied technician.
 Do not push-start or pull-start this
vehicle.
NOTE
Under U.S. federal law, any
modi fication to the
original-equipment emission control
system before the first sale and
registration of a vehicle is subject to
penalties. In some states, such modi fication made on a used vehicle
is also subject to penalties.
While the engine is o ff, 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 operates
while the engine is o ff.
▼ 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 contains 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 all windows fully open and
contact an Authorized Mazda Dealer
immediately.
Before Driving
Fuel and Emission
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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 exhaust 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.Fuel-Filler Lid and Cap
▼Fuel-Filler Lid and Cap
WARNING
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 o ff automatically
is dangerous because overfilling the
fuel tank may cause fuel over flow or
leakage. Fuel over flow and leakage
could damage the vehicle and if the
fuel ignites it could cause a fire and
explosion resulting in serious injury or
death.
Before Driving
Fuel and Emission
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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.
 When using an automatic car wash
or a high water pressure car washer,
lock the driver's door. Otherwise,
the fuel- filler lid may open
unexpectedly and could be
damaged.
▼ Refueling
Before refueling, close all the doors,
windows, and liftgate/trunk lid, and
switch the ignition OFF.
1. Using the following , unlock the
driver’s door.
Transmitter (page 3-16)Touch sensor (page 3-13)Door-lock switch (page 3-16)Auto lock/unlock function (page
3-17)
NOTE
When unlocking the driver's
door, the fuel lid is also unlocked
at the same time.
When locking the driver's door,
the fuel lid is locked after 90
seconds.
The time until the fuel lid is
locked after locking the driver's
door can be changed.
Refer to the Settings section in
the Mazda Connect Owner's
Manual.
However, when the driver's door
is locked using the following
functions, the fuel lid is also
locked at the same time.
Auto lock/unlock function
(page 3-17)
Auto re-lock function (page
3-5) and (page 3-13)
2. Press the location shown in the illustration and open the fuel lid.

3. To remove the fuel- filler cap, turn it
counterclockwise.
4. Attach the removed cap to the inner side of the fuel-filler lid.

4–door
1. Fuel- filler lid
2. Fuel- filler cap

Before Driving
Fuel and Emission
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5–door
1.Fuel- filler lid
2. Fuel- filler cap

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

4–door
5–door
8. Make sure to lock all the doors when leaving the vehicle.
NOTE
Lock the doors after closing the
fuel- filler lid.
If the fuel- filler lid is closed after
locking the doors, the fuel- filler lid
cannot be locked.
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 o ff the right-of-way, remove the
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 o ff) 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
Fuel and Emission
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Mirrors
▼Mirrors
Before driving , adjust the inside and
outside mirrors.
▼Outside Mirrors
WARNING
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. Press the select switch for the
outside mirror to be adjusted to
turn on the indicator light.
2. Press the adjustment switch toadjust the angle of the outside
mirror.
1. Indicator light
2. Select switch
3. Adjustment switch

After adjusting the an gle of the outside
mirror, press the select switch for the
outside mirror to be adjusted to turn
o ff the indicator light.
NOTE
(With driving position memory
function)
The on-road outside mirror position
can be programmed in conjunction
with the driving position memory
function.
Refer to Driving Position Memory on
page 2-11.
Before Driving
Mirrors
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