key MAZDA MODEL 3 HATCHBACK 2021 Owners Manual

Table of Contents
Pictorial Index
Interior, exterior views and part identification of your Mazda.1
Essential Safety Equipment
Important information about safety equipment, including seats, seat
belt system, child-restraint systems and SRS air bags.2
Before Driving
Use of various features, including keys, doors, mirrors and windows.3
When Driving
Information concerning safe driving and stopping.4
Interior Features
Use of various features for ride
comfort, including air-conditioning
system and audio system.5
Maintenance and Care
How to keep your Mazda in top condition.6
If Trouble Arises
Helpful information on what to do if a problem arises with the
vehicle.7
Customer Information and Reporting Safety Defects
Important consumer information including warranties and add-on
equipment.8
Speci fications
Technical information about your Mazda.9
Index10
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Do not drive with either front seats
reclined:
Sitting in a reclined position while the
vehicle is moving is dangerous because
you do not get the full protection from
seat belts. During sudden braking or a
collision, you can slide under the lap
belt and suffer serious internal injuries.
For maximum protection, sit well back
and upright.
Do not place an object such as a
cushion between the seatback and
your back:
Putting an object such as a cushion
between the seatback and your back is
dangerous because you will be unable
to maintain a safe driving posture and
the seat belt cannot function at its full
capacity in a collision, which could
result in a serious accident, injury or
death.
Do not place objects under the seat:
The object could get stuck and cause
the seat to not be fixed securely, and
result in an accident.
Do not stack cargo higher than the
seatbacks:
Stacking luggage or other cargo higher
than the seatbacks is dangerous.
During sudden braking or a collision,
objects can fly around and become
projectiles that may hit and injure
passengers.
Make sure luggage and cargo is
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.
Additionally, if the air bags deploy, the
cargo may scatter which could result in
serious injury or death.Never allow a passenger to sit or
stand on the folded seatback while
the vehicle is moving:
Driving with a passe nger on the folded
seatback is dangerous. Allowing a child
to sit up on the folded seatback while
the vehicle is moving is particularly
dangerous. In a sudden stop or even a
minor collision, a child not in a proper
seat or child-restraint system and seat
belt could be thrown forward, back or
even out of the vehicle resulting in
serious injuries or death. The child in
the baggage area could be thrown into
other occupants and cause serious
injury.
Never give the car keys to children
and do not allow them to play in the
vehicle (4–Door):
Playing with the folding rear seats is
dangerous. Once the seatbacks are
back up, a child in the trunk would not
be able to get out the way they had
entered. If you have small children,
keep the seatbacks locked.
Always leave your car locked and
keep the car keys safely away from
children (4–Door):
Leaving your car unlocked or the keys
in reach of children is dangerous.
Children who find their way into the
trunk through an unlocked rear
seatback or an open trunk can become
accidentally locked in the trunk. This
could result in death or brain damage
from heat prostration, particularly in
the summer. Always lock the doors and
the trunk, and as an added measure,
keep the rear seatbacks locked,
whether you have children in your
home or not.
Essential Safety Equipment
Seats
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NOTE
When adjustment of the driving
position is not necessary, a sound is
not activated.
The driving position adjustment is
canceled in the following cases:
The seat adjustment switch on the
driver's seat is operated.
The angle of the outer mirrors is
adjusted.
The SET button is pressed.Programming button 1 or 2 is
pressed.
The lock button or unlock button
on the transmitter is pressed.
The vehicle starts moving.The active driving display is
adjusted.
(Manual transmission)
The parking brake is released.
(Automatic transmission)
The selector lever is shifted to a
position other than P.
Erasing programmed driving positions
Erasing the driving positions
programmed to the key
1. Switch the ignition OFF.
2. Press the SET button continuously until a sound is activated.
3. Press the lock button on the transmitter within 5 seconds after
the sound is activated.
NOTE
If you do not perform the operation
correctly, a sound indicating that the
programming has failed is activated.
▼Adjusting the Front Passenger's
Seat
1.
Seat Slide
To move a seat forward or
backward, raise the lever and slide
the seat to the desired position and
release the lever.
Make sure the lever returns to its
original position and the seat is
locked in place by attempting to
push it forward and backward.
2. Seat Recline
To change the seatback angle, lean
forward slightly while raising the
lever. Then lean back to the desired
position and release the lever.
Make sure the lever returns to its
original position and the seatback is
locked in place by attempting to
push it forward and backward.

Essential Safety Equipment
Seats
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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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Keys
▼Keys
WARNING
Do not leave the key in your vehicle
with children and keep them in a
place where your children will not
fi
nd or play with them:
Leaving children in a vehicle with the
key is dangerous. This could result in
someone being badly injured or even
killed. Children may find these keys to
be an interesting toy to play with and
could cause the power windows or
other controls to operate, or even
make the vehicle move.
CAUTION
 Because the key (transmitter) uses
low-intensity radio waves, it may not
function correctly under the
following conditions:
 The key (transmitter) is carried with
communication devices such as
cellular phones.
 The key (transmitter) contacts or is
covered by a metal object.
 The key (transmitter) is near
electronic devices such as personal
computers.
 Non-Mazda genuine electronic
equipment is installed in the
vehicle.
 There is equipment which
discharges radio waves near the
vehicle.
 The key (transmitter) may consume
battery power excessively if it
receives high-intensity radio waves.
Do not place the key (transmitter)
near electronic devices such as
televisions or personal computers.
To avoid damage to the key
(transmitter), DO NOT :
 Drop the key (transmitter).
 Get the key (transmitter) wet.
 Disassemble the key (transmitter).
 Expose the key (transmitter) to
high temperatures on places such
as the dashboard, under direct
sunlight.
 Expose the key (transmitter) to any
kind of magnetic field.
 Place heavy objects on the key
(transmitter).
 Put the key (transmitter) in an
ultrasonic cleaner.
 Put any magnetized objects close
to the key (transmitter).

NOTE
The driver must carry the key
(transmitter) to ensure the system
functions properly.
Before Driving
Keys
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Tra n s m i t t e r
1. Transmitter (page 3-5)

Auxiliary key
There is a removable auxiliary key
inside the transmitter.

Removing the auxiliary key
1. Remove the lower cover whilepressing the knob in the direction
of the arrow.
2. Remove the auxiliary key.
Installing the auxiliary key
1. Install the auxiliary key as the
illustration.
2. Insert the tabs of the lower coverinto the slots of the transmitter and
install the lower cover.

Key code number plate
A code number is stamped on the
plate attached to the key set; detach
this plate and store it in a safe place
(not in the vehicle) for use if you need
to make a replacement key (auxiliary
key).
Also write down the code number and
keep it in a separate safe and
convenient place, but not in the
vehicle.
If your key (auxiliary key) is lost, consult
an Authorized Mazda Dealer and have
your code number ready.
1. Key code number plate
Before Driving
Keys
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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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▼Transmitter
1. Operation indicator light
2. Lock button (
)
3. Unlock button (
)
4. Trunk button (4–door) (
)
5. Panic button (
)
NOTE
The headlights turn on/o ff by
operating the transmitter. Refer to
Leaving Home Light on page 4-50.
(With theft-deterrent system)
The hazard warning lights flash when
the theft-deterrent system is armed
or turned off.
Refer to Theft-Deterrent System on
page 3-42.
(With the advanced keyless
function)
A beep sound can be heard for
con firmation when the doors,
liftgate, and fuel-filler lid are locked/
unlocked using the key. If you prefer,
the beep sound can be turned o ff.
The volume of the beep sound can
also be changed.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
The operation indicator light flashes
when the buttons are pressed.
Lock button
To lock the doors, liftgate, and
fuel- filler lid, press the lock button and
the hazard warning lights will flash
once.
(With the advanced keyless function)
A beep sound will be heard once.

To con firm that all the doors, liftgate,
and fuel- filler lid have been locked,
press the lock button again within 5
seconds. If they are closed and locked,
the horn will sound.
NOTE
If the lock button is pressed with any
door or liftgate/trunk lid open, any
closed door can be locked. Close
any open door and liftgate/trunk lid
to lock.
Con firm that all the doors, liftgate,
and fuel- filler lid are locked visually
or audibly by use of the double click.
Make sure all the doors, liftgate, and fuel- filler lid are locked after pressing
the button.
Before Driving
Keys
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(With theft-deterrent system)
If the lock button is pressed with all
the doors and liftgate closed, the
hazard warning lights will flash and
the theft-deterrent system is armed.
Unlock button
To unlock the driver's door and the
fuel- filler lid, press the unlock button
and the hazard warning lights will flash
twice.
(With the advanced keyless function)
A beep sound will be heard twice.

To unlock the other doors and liftgate,
press the unlock button again within 5
seconds and two more beep sounds
will be heard.
NOTE
The system can be set to unlock all
the doors, liftgate, and fuel-filler lid
when pressing the unlock button
once.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
(Auto re-lock function)
After unlocking with the key, all the
doors, liftgate, and fuel-filler lid will
automatically lock if any of the
following operations are not
performed within about 60 seconds.
If your vehicle has a theft-deterrent
system, the hazard warning lights will fl ash for con firmation.
The time required for the doors to
lock automatically can be changed.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
A door or the liftgate/trunk lid is
opened.
The ignition is switched to any
position other than off .
(With theft-deterrent system)
When the doors are unlocked by
pressing the unlock button on the
key while the theft-deterrent system
is turned off, the hazard warning
lights will flash twice to indicate that
the system is turned o ff.
Trunk button (4–door)
To open the trunk lid, press and hold
the trunk button until the trunk lid
opens.
Panic button
If you witness from a distance
someone attempting to break into or
damage your vehicle, press and hold
the panic button to activate the
vehicle's alarm. Call emergency
services if necessary.
NOTE
The panic button will work whether
any door or the liftgate/trunk lid is
open or closed.
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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