engine MAZDA MODEL 3 HATCHBACK 2021 Owners Manual

CAUTION
When operating a seat, be careful
not to put your hands or fingers near
the moving parts of the seat or on
the side trim to prevent injury.
 When moving the seats, make sure
there is no cargo in the surrounding
area. If the cargo gets caught it could
damage the cargo.
 (Manual Seat)
When moving the seats forward and
rearward or returning a rear-reclined
seatback to its upright position,
make sure you hold onto the
seatback with your hand while
operating. If the seatback is not held,
the seat will move suddenly and
could cause injury.
 When inserting your hand under the
seat to clean the cabin or pick up
something you dropped under the
seat, be careful not to hurt yourself.
If you contact the moving parts and
surrounding parts around the seat
rail, seat frame, and the bottom of
the seat, it could result in injury.
NOTE
When returning a rear seat to its
original position, place the seat belt
in its normal position. Verify that the
seat belt pulls out and retracts.
(Power Seat)
The seat-bottom power adjustment
is operated by motors. Avoid
extended operation because
excessive use can damage the
motors.
To prevent the battery from
running down, avoid using the
power adjustment when the
engine is stopped. The adjuster
uses a large amount of electrical
power.
Do not use the switch to make
more than one adjustment at a
time.
Essential Safety Equipment
Seats
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Seat Warmer*
▼Seat Warmer
The front seats can be warmed up
while the engine is running.
While the seat warmer is operating,
the indicator light in the seat warmer
switch turns on according to the set
temperature.
Manual mode
When the seat warmer switch is
pressed, the seat warmer operates in
manual mode.
The set temperature changes as shown
in the
figure each time the seat warmer
switch is pressed.
1. OFF
2. High
3. Mid
4. Low
NOTE
If the engine is turned off while the
seat warmer is operating in manual
mode, the seat warmer does not turn
on automatically the next time the
engine is turned on. To turn the seat
warmer on, press the switch again.
Auto mode
The driver and front passenger's seat
warmer can be operated in auto mode
using the following procedure.
1. If “Occupant Comfort” has been disabled, enable it using the
following procedure.
a) Select “Settings” from the MazdaConnect home screen.
b) Select “Vehicle Settings”.
c) Enable “Occupant Comfort”.
2. Press the AUTO switch.
While in auto mode, the seat
temperature is automatically controlled
in 4 levels (High, Mid, Low, and OFF)
according to the conditions in the
cabin.
NOTE
If the front passenger’s seat belt is
unfastened, the front passenger’s
seat warmer turns off.
If the seat warmer switch is pressed
during auto mode, the seat warmer
on the side where the switch was
pressed switches to manual mode.
To return to auto mode, press the
AUTO switch.
If the engine is turned
off while the
seat warmer is operating in auto
mode, the seat warmer operates in
auto mode again the next time the
engine is turned on.

Essential Safety Equipment
Seat Warmer/Heated Steering Wheel
2-20*Some models.
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3Before Driving
Use of various features, including keys, doors, mirrors and
windows.
Keys........................................ 3-2 Keys...................................... 3-2
Keyless Entry System...............3-4
Advanced Keyless Entry
System.....................................3-9 Advanced Keyless Entry
System
*................................. 3-9
Operational Range...............3-10
Doors and Locks..................... 3-11 Door Locks.......................... 3-11
Liftgate/Trunk Lid.................3-19
Inside Trunk Release Lever (4-
door)
*................................. 3-24
Fuel and Emission................... 3-25 Fuel and Engine Exhaust
Precautions......................... 3-25
Fuel-Filler Lid and Cap..........3-27
Mirrors.................................. 3-30 Mirrors................................3-30
Windows............................... 3-34 Power Windows...................3-34
Moonroof*.......................... 3-37
Security System.......................3-40 Modi fication and Add-
On Equipment..................... 3-40
Immobilizer System..............3-40
Theft-Deterrent System
*........3-42
Driving Tips............................ 3-44 Break-In Period.................... 3-44
Saving Fuel and Protection of the
Environment........................ 3-44
Hazardous Driving............... 3-45
Floor Mat............................ 3-46
Rocking the Vehicle..............3-46
Winter Driving..................... 3-47
Driving In Flooded Area........3-49
Overloading........................ 3-49
Driving on Uneven Road.......3-50
Turbocharger Information
(SKYACTIV -G 2.5T).............. 3-50
Towing.................................. 3-51 Trailer Towing...................... 3-51
Recreational Towing............. 3-51
*Some models.3-1
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Keyless Entry System
▼Keyless Entry System
This system uses the key buttons to
remotely lock and unlock the doors,
liftgate, and fuel-
filler lid, and opens
the trunk lid.
The system can start the engine
without having to take the key out of
your purse or pocket.
It can also help you signal for attention
or help.
Operating the theft-deterrent system is
also possible on theft-deterrent
system-equipped vehicles.

System malfunctions or warnings are
indicated by the following warning
lights or beeps.
Check the displayed message for more
information and, if necessary, have the
vehicle inspected at an Authorized
Mazda Dealer, according to the
indication.
KEY Warning Indication/Warning
Light (Red)
Refer to KEY Warning Indication/
Warning Light (Red) on page 7-33.
Ignition Not Switched O ff (STOP)
Warning Beep
Refer to Ignition Not Switched Off
(STOP) Warning Beep on page
7-43.
Key Removed from Vehicle Warning
Beep
Refer to Key Removed from Vehicle
Warning Beep on page 7-43.
If you have a problem with the key,
consult an Authorized Mazda Dealer.

If your key is lost or stolen, consult an
Authorized Mazda Dealer as soon as
possible for a replacement and to
make the lost or stolen key inoperative.
CAUTION
Radio equipment like this is governed
by laws in the United States.
Changes or modi fications not expressly
approved by the party responsible for
compliance could void the user's
authority to operate the equipment.
NOTE
The keyless entry system operation
may vary due to local conditions.
The keyless entry system is fully
operational when the ignition is
switched off . The system does not
operate if the ignition is switched to
any position other than o ff.
If the key does not operate when
pressing a button or the operational
range becomes too small, the battery
may be weak. To install a new
battery, refer to Key Battery
Replacement (page 6-31).
Battery life is about 1 year. Replace
the battery with a new one if the
messages are displayed in the
instrument cluster. Replacing the
battery about once a year is
recommended because the KEY
warning indication may not display
depending on the rate of battery
depletion.
Additional keys can be obtained at
an Authorized Mazda Dealer. Up to
6 keys can be used with the keyless
functions per vehicle. Bring all keys
to an Authorized Mazda Dealer
when additional keys are required.
Before Driving
Keys
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(Turning on the alarm)
Pressing the panic button for 1 second
or more will trigger the alarm for about
2 minutes and 30 seconds, and the
following will occur:
The horn sounds intermittently.The hazard warning lights flash.
(Turning off the alarm)
The alarm stops by pressing any button
on the key.
Power saving function
By turning on the transmitter power
saving function, the advanced keyless
entry
*1 and push button start system
functions turn o ff and the battery
power consumption of the transmitter
is restricted.
The remote control function is
operational by operating the
transmitter switch even while the
power saving function is turned on.
However, the operation indicator light
of the transmitter does not turn on/
fl ash.
Turning on the power saving function
After you have turned on the power
saving function according to the
following procedure, the hazard
warning lights and sound operate
*1
one time.
1. Press the lock button on the transmitter 4 times within 3
seconds to turn on the operation
indicator light.
2. Press the lock button continuously for 1.5 seconds or longer while the
operation indicator light turns on
(for 5 seconds).
3. Press any of the buttons on the transmitter to make sure that the
operation indicator light does not
turn on/ flash.
Tu r n i n g o ff the power saving function
After you have turned off the power
saving function according to the
following procedure, the hazard
warning lights and sound operate
*1
one time.
1. Press any of the buttons on the transmitter to make sure that the
operation indicator light does not
turn on/fl ash.
2. Press the lock button on the transmitter 4 times within 3
seconds to turn on the operation
indicator light.
3. Press the lock button continuously for 1.5 seconds or longer while the
operation indicator light turns on
(for 5 seconds).
*1 With the advanced keyless function
▼Operational Range
The system operates only when the
driver is in the vehicle or within
operational range while the key is
being carried.
Starting the engine
NOTE
Starting the engine may be possible
even if the key is outside of the
vehicle and extremely close to a door
and window, however, always start
the engine from the driver's seat.
If the vehicle is started and the key is
not in the vehicle, the vehicle will not
restart after it is shut o
ff and the
ignition is switched o ff.
The luggage compartment/trunk is
out of the assured operational range,
however, if the key (transmitter) is
operable the engine will start.
Before Driving
Keys
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With the advanced keyless function

1. Interior antenna
2. Operational range

Without the advanced keyless
function

1. Interior antenna
2. Operational range

NOTE
The engine may not start if the key is
placed in the following areas:
Around the dashboardIn the storage compartments such as
the glove compartment or the center
console
On the rear parcel shelf (4–door)
▼Key Suspend Function
If a key is left in the vehicle, the
functions of the key left in the vehicle
are temporarily suspended to prevent
theft of the vehicle.
To restore the functions, press the
unlock button on the
functions-suspended key in the
vehicle.
Before Driving
Keys
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Advanced Keyless EntrySystem
*
▼Advanced Keyless Entry System
WARNING
Radio waves from the key may a
ffect
medical devices such as pacemakers:
Before using the key near people who
use medical devices, ask the medical
device manufacturer or your physician
if radio waves from the key will aff ect
the device.
The advanced keyless function allows
you to lock/unlock the door, liftgate,
and fuel- filler lid, or open the liftgate/
trunk lid while carrying the key.

System malfunctions or warnings are
indicated by the following warning
beeps.
Touch Sensor Inoperable Warning
Beep
Refer to Touch Sensor Inoperable
Warning Beep (With the advanced
keyless function) on page 7-44.
Liftgate Door-lock Switch Inoperable
Warning Beep
Refer to Liftgate Door-lock Switch
Inoperable Warning Beep (With the
advanced keyless function) on page
7-44.
Key Left-in-luggage Compartment/
Trunk Warning Beep
Refer to Key Left-in-luggage
Compartment/Trunk Warning Beep
(With the advanced keyless function)
on page 7-44.
Key Left-in-vehicle Warning Beep
Refer to Key Left-in-vehicle Warning
Beep (With the advanced keyless
function) on page 7-44.
NOTE
The advanced keyless entry system
functions can be deactivated to
prevent any possible adverse eff ect on
a user wearing a pacemaker or other
medical device. If the system is
deactivated, you will be unable to start
the engine by carrying the key. Consult
an Authorized Mazda Dealer for
details. If the advanced keyless entry
system has been deactivated, you can
start the engine by following the
procedure indicated when the key
battery goes dead.
Refer to Engine Start Function When
Key Battery is Dead on page 4-8.
Before Driving
Advanced Keyless Entry System
*Some models.3-9
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NOTE
Always stop the engine and lock the
doors. In addition, to prevent theft of
valuables, do not leave them inside
the cabin.
If the key is left in the following areas
and you leave the vehicle, the doors
may be locked depending on the
radio wave conditions even if the key
is left in the vehicle.
Around the dashboardIn the storage compartments such
as the glove compartment or the
center console
On the rear parcel shelf (4–door)Next to a communication device
such as a mobile phone
When the ignition is switched to
ACC or ON, the vehicle lock-out
prevention feature prevents you from
locking yourself out of the vehicle.
All doors, fuel-filler lid, and liftgate
will automatically unlock if they are
locked using the power door locks
with any door or the liftgate open.
The vehicle lock-out prevention
feature does not operate while the
ignition is switched o ff.
When all doors, fuel-filler lid, and
liftgate are locked using the power
door lock with any door or the
liftgate/trunk lid open, the closed
doors, fuel- filler lid, and liftgate are
locked. After that, when all doors
and the liftgate/trunk lid are closed,
all doors and the liftgate/trunk lid
are locked. However, if the key is
inside the vehicle, all doors,
fuel- filler lid, and liftgate are
automatically unlocked.
(With the advanced keyless
function)
The beep sound is heard for about
10 seconds to notify the driver that
the key has been left in the vehicle.
(Without the advanced keyless
function)
The horn sound is heard twice to
notify the driver that the key has
been left in the vehicle.
(Door unlock (control) system with
collision detection)
This system automatically unlocks the
doors, fuel-filler lid, and liftgate in
the event the vehicle is involved in an
accident to allow passengers to get
out of the vehicle immediately and
prevent being trapped inside. While
the ignition is switched ON and in
the event the vehicle receives an
impact strong enough to in flate the
air bags, all the doors, fuel- filler lid,
and liftgate are automatically
unlocked after about 6 seconds have
elapsed from the time of the
accident.
The doors, fuel-filler lid, and liftgate
may not unlock depending on how
an impact is applied, the force of the
impact, and other conditions of the
accident.
If door-related systems or the battery
is malfunctioning, the doors, fuel- filler lid, and liftgate may not
unlock depending on your vehicle
type.
Before Driving
Doors and Locks
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CAUTION
Before opening the liftgate/trunk lid,
remove any snow and ice
accumulation on it. Otherwise, the
liftgate/trunk lid could close under
the weight of the snow and ice
resulting in injury.
 Be careful when opening/closing the
liftgate/trunk lid during strong
winds. If a strong gust blows against
the liftgate/trunk lid, it could close
suddenly resulting in injury.
 Fully open the liftgate/trunk lid and
make sure that it stays open. If the
liftgate/trunk lid is only opened
partially, it could slam shut by
vibration or wind gusts resulting in
injury.
 When loading or unloading luggage
in the luggage compartment/trunk,
turn
off the engine. Otherwise, you
could get burned by the heat of the
exhaust gas.
 Be careful not to apply excessive
force to the damper stay on the
liftgate such as by putting your hand
on the stay. Otherwise, the damper
stay may bend and
aff ect the liftgate
operation.
1. Damper stay
 Do not modify or replace the liftgate
damper stay. Consult an Authorized
Mazda Dealer if a liftgate damper
stay is deformed or damaged for
reasons such as a collision or if there
is some other problem.
▼ Opening and Closing the Liftgate/
Tr u n k L i d
Opening the liftgate (5–door)
Using the electric liftgate opener
Unlock the doors and liftgate, then
press the electric liftgate opener on the
liftgate and raise the liftgate when the
latch releases.
NOTE
(With the advanced keyless function)
A locked liftgate can also be opened
while the key is being carried.
When opening the liftgate with the
doors and the liftgate locked, it may
require a few seconds for the liftgate
latch to release after the electric
liftgate opener is pressed.
Before Driving
Doors and Locks
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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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