2021 MAZDA MODEL 3 HATCHBACK fuel

4-Door
▼4-Door
ƒ
Windshield wiper blades................................................................... page 6-23
„ Moonroof......................................................................................... page 3-37
… Door................................................................................................ page 3-11
† Window........................................................................................... page 3-34
‡ Touch sensor.....................................................................................page 3-13
ˆ Fuel- filler lid......................................................................................page 3-27
‰ Outside mirror.................................................................................. page 3-30
Š Touch sensor.....................................................................................page 3-13
‹ Trunk lid........................................................................................... page 3-19
ΠElectric trunk lid opener..................................................................... page 3-20
Pictorial Index
Exterior Overview
1-8The equipment and installation position varies by vehicle
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5-Door
▼5-Door
ƒ
Windshield wiper blades................................................................... page 6-23
„ Moonroof......................................................................................... page 3-37
… Door................................................................................................ page 3-11
† Window........................................................................................... page 3-34
‡ Touch sensor.....................................................................................page 3-13
ˆ Fuel- filler lid......................................................................................page 3-27
‰ Outside mirror.................................................................................. page 3-30
Š Touch sensor.....................................................................................page 3-13
‹ Liftgate............................................................................................. page 3-19
ΠElectric liftgate opener....................................................................... page 3-20
Rear window wiper blade.............. .................................................... page 6-27
Pictorial Index
Exterior Overview
The equipment and installation position varies by vehicle1-9
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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
3-4
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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
3-5
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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
3-6
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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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Door Locks
▼Door Locks
WARNING
Always take all children and pets with
you or leave a responsible person
with them:
Leaving a child or a pet unattended in
a parked vehicle is dangerous. In hot
weather, temperatures inside a vehicle
can become high enough to cause
brain damage or even death.
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.
Keep all doors locked when driving:
Unlocked doors in a moving vehicle
are dangerous. Passengers can fall out
if a door is accidentally opened and
can more easily be thrown out in an
accident.
Always close all the windows and
moonroof, lock the doors, fuel-filler
lid, and liftgate and take the key with
you when leaving your vehicle
unattended:
Leaving your vehicle unlocked is
dangerous as children could lock
themselves in a hot vehicle, which
could result in death. Also, a vehicle
left unlocked becomes an easy target
for thieves and intruders.
After closing the doors and the
liftgate/trunk lid, always verify that
they are securely closed:
Doors and the liftgate/trunk lid not
securely closed are dangerous, if the
vehicle is driven with a door and the
liftgate/trunk lid not securely closed,
the door and the liftgate/trunk lid
could open unexpectedly resulting in
an accident.
Always con firm the safety around the
vehicle before opening a door and the
liftgate/trunk lid:
Suddenly opening a door and the
liftgate/trunk lid is dangerous. A
passing vehicle or a pedestrian could
be hit and cause an accident.
CAUTION
 Always
confirm the conditions
around the vehicle before opening/
closing the doors and the liftgate/
trunk lid and use caution during
strong winds or when parked on an
incline. Not being aware of the
conditions around the vehicle is
dangerous because fingers could get
caught in the door and the liftgate/
trunk lid or a passing pedestrian
could be hit, resulting in an
unexpected accident or injury.
Before Driving
Doors and Locks
3-11
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