belt MAZDA MODEL 3 HATCHBACK 2021 Owners Manual

Thank you for choosing a Mazda. We at Mazda design and build vehicles with
complete customer satisfaction in mind.

To help ensure enjoyable and trouble-free operation of your Mazda, read this
manual carefully and follow its recommendations.

An Authorized Mazda Dealer knows your vehicle best. So when maintenance or
service is necessary, that's the place to go.

Our nationwide network of Mazda professionals is dedicated to providing you with
the best possible service.

We assure you that all of us at Mazda have an ongoing interest in your motoring
pleasure and in your full satisfaction with your Mazda product.
Mazda Motor CorporationHIROSHIMA, JAPAN

Important Notes About This Manual
Keep this manual in the glove compartment as a handy reference for the safe and enjoyable use of
your Mazda. Should you resell the vehicle, le ave this manual with it for the next owner.

All specifi cations and descriptions are accurate at the time of printing. Because improvement is a con-
stant goal at Mazda, we reserve the right to make changes in speci fications at any time without notice
and without obligation.

Air Conditioner and the Environment
Your Mazda's genuine air conditioner is filled with a refrigerant that has been found not to damage
the earth's ozone layer. If the air conditioner does not operate properly, consult an Authorized Mazda
Dealer.
Perc h l o rate
Certain components of this vehicle such as [air ba g modules, seat belt pretensioners, lithium batteries,
…] may contain Perchlorate Material-- Special handling may apply for service or vehicle end of life dis-
posal. See
www.dtsc.ca.gov/hazardouswaste/perchlorate.

Please be aware that this manual applies to all models, equipment and options. As a result, you
may find some explanations for equipment not installed on your vehicle.

©2020 Mazda Motor CorporationAugust 2020 (Print1)
A Word to Mazda Owners
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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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Interior Equipment (View C)
▼Interior Equipment (View C)
ƒ
Head restraint................................................................................... page 2-17
„ Front seat........................................................................................... page 2-5
… Seat belt........................................................................................... page 2-23
† Bottle holder.....................................................................................page 5-44
‡ Vanity mirror..................................................................................... page 5-38
ˆ Sunvisor........................................................................................... page 5-38
‰ Overhead light (front)/Map lights...................................................... page 5-39
Š Overhead console............................................................................. page 5-46
‹ Moonroof switch...............................................................................page 3-38
ΠRearview mirror................................................................................ page 3-32
Vent................................................................................................... page 5-3
Ž Cup holder....................................................................................... page 5-42
Shift lever/Selector lever...........................................................page 4-33, 4-35
Drive selection switch........................................................................ page 4-81
‘ Commander switch........................................................................... page 5-19
’ Electric Parking Brake (EPB) switch...................................................... page 4-66
“ AUTOHOLD switch........................................................................... page 4-73
Pictorial Index
Interior Overview
1-4The equipment and installation position varies by vehicle
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Interior Equipment (View D)
▼Interior Equipment (View D)
ƒ
Push knob (5-door)........................................................................... page 2-14
„ Head restraint................................................................................... page 2-17
… Child safety lock................................................................................page 3-19
† Rear coat hook..................................................................................page 5-45
‡ Power window switch........................................................................page 3-34
ˆ Overhead light (rear)......................................................................... page 5-39
‰ Door-lock knob................................................................................ page 3-18
Š Assist grip......................................................................................... page 5-44
‹ Center console................................................................................. page 5-46
ΠAccessory socket............................................................................... page 5-41
External input terminal.......................................................................page 5-15
Ž Bottle holder.....................................................................................page 5-44
Rear seat.......................................................................................... page 2-14
Cup holder....................................................................................... page 5-42
‘ Armrest............................................................................................ page 2-16
’ ISOFIX lower anchors (Mexico)/LATCH lower anchors (Except Mexico) ...............
........................................................................................................page 2-50
“ Seat belt........................................................................................... page 2-23
Pictorial Index
Interior Overview
The equipment and installation position varies by vehicle1-5
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2Essential Safety Equipment
Important information about safety equipment, including seats,
seat belt system, child-restraint systems and SRS air bags.
Seats....................................... 2-2 Seat Precautions.................... 2-2
Front Seat..............................2-5
Rear Seat.............................2-14
Head Restraints................... 2-17
Seat Warmer/Heated Steering
Wheel................................... 2-20 Seat Warmer
*...................... 2-20
Heated Steering Wheel
*........2-21
Seat Belt Systems.................... 2-23 Seat Belt Precautions............ 2-23
Seat Belt..............................2-26
Seat Belt Warning Systems.... 2-27
Front Seat Belt Pretensioner and
Load Limiting Systems.......... 2-28
Seat Belt Extender................ 2-30
Child Restraint........................2-32 Child-Restraint Precautions..........
.......................................... 2-32
Child-Restraint System
Installation.......................... 2-37
Child-Restraint System Suitability
for Various Seat Positions
Table...................................2-39
Installing Child-Restraint
Systems............................... 2-42
SRS Air Bags........................... 2-55 Supplemental Restraint System
(SRS) Precautions.................2-55
Supplemental Restraint System
Components....................... 2-61
How the SRS Air Bags
Work.................................. 2-63
SRS Air Bag Deployment
Criteria............................... 2-67
Limitations to SRS Air Bag..... 2-69
Driver and Front Passenger
Occupant Classi fication
System
*............................... 2-70
Constant Monitoring............ 2-75
*Some models.2-1
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Seat Precautions
▼Seat Precautions
WARNING
Make sure the adjustable components
of a seat are locked in place:
Adjustable seats and seatbacks that are
not securely locked are dangerous. In a
sudden stop or collision, the seat or
seatback could move, causing injury.
Make sure the adjustable components
of the seat are locked in place by
attempting to slide the seat forward
and backward and rocking the
seatback.
Never allow children to adjust a seat:
Allowing children to adjust a seat is
dangerous as it could result in serious
injury if a child's hands or feet become
caught in the seat.
Do not drive with the seatback
unlocked:
All of the seatbacks play an important
role in your protection in a vehicle.
Leaving the seatback unlocked is
dangerous as it can allow passengers
to be ejected or thrown around and
baggage to strike occupants in a
sudden stop or collision, resulting in
severe injury. After adjusting the
seatback at any time, even when there
are no other passengers, rock the
seatback to make sure it is locked in
place.
Adjust a seat only when the vehicle is
stopped:
If the seat is adjusted while the vehicle
is being driven, the seating posture
may become unstable and the seat
could move unexpectedly resulting in
injury.
Do not modify or replace the front
seats:
Modifying or replacing the front seats
such as replacing the upholstery or
loosening any bolts is dangerous. The
front seats contain air bag components
essential to the supplemental restraint
system. Such modi
fications could
damage the supplemental restraint
system and result in serious injury.
Consult an Authorized Mazda Dealer if
there is any need to remove or reinstall
the front seats.
Do not drive with damaged front
seats:
Driving with damaged front seats, such
as seat cushions torn or damaged
down to the urethane, is dangerous. A
collision, even one not strong enough
to in flate the air bags, could damage
the front seats which contain essential
air bag components. If there was a
subsequent collision, an air bag may
not deploy which could lead to
injuries. Always have an Authorized
Mazda Dealer inspect the front seats,
front seat belt pretensioners and air
bags after a collision.
Essential Safety Equipment
Seats
2-2
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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
2-3
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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
2-4
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Rear Seat
▼Split Folding the Seatbacks
By lowering the rear seatbacks the
luggage compartment space can be
expanded.
WARNING
Do not drive the vehicle with
occupants on folded down seatbacks
or in the luggage compartment.
Putting occupants in the luggage
compartment is dangerous because
seat belts cannot be fastened which
could lead to serious injury or death
during sudden braking or a collision.
Do not allow children to play inside
the vehicle with the seatbacks
lowered.
Allowing children to play in the vehicle
with the seatbacks folded down is
dangerous. If a child enters the luggage
compartment and the seatbacks were
raised back up, the child may become
trapped in the luggage compartment
which could lead to an accident.
Tightly secure cargo in the luggage
compartment when it is transported
with the seatbacks folded down.
Driving without tightly securing cargo
and luggage is dangerous as it could
move and become an obstruction to
driving during emergency braking or a
collision resulting in an unexpected
accident.
When transporting cargo, do not
allow the cargo to exceed the height
of the seatbacks.
Transporting cargo stacked higher than
the seatbacks is dangerous as visibility
to the rear and sides of the vehicle is
reduced which could interfere with
driving operations and lead to an
accident.
Lowering the seatbacks
CAUTION

(5–Door)
When folding the seatback forward,
always support the seatback with
your hand. If it is not supported by a
hand, fingers or the hand pressing
the push knob could be injured.
 Check the position of a front seat
before folding a rear seatback.
Depending on the position of a front
seat, it may not be possible to fold a
rear seatback all the way down
because it may hit the seatback of
the front seat which could scratch or
damage the front seat or its pocket.
Lower or remove the head restraint
on the rear outboard seat if
necessary.
Essential Safety Equipment
Seats
2-14
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(4–Door)
1. Open the trunk lid and pull thelever of the seatback you want to
fold down.

2. Open a rear door and fold the rearseat forward.
(5–Door)
Press the push knob to fold down the
seatback.

To return the seatback to its upright
position:
WARNING
When returning a seatback to its
upright position, make sure the
3-point seat belt is not caught in the
seatback and the 3-point seat belt is
not twisted.
If the seat belt is used while it is
twisted and caught in the seatback, the
seat belt cannot function at its full
capacity, which could cause serious
injury or death.
When returning a seatback to its
upright position, make sure that it is
fi rmly locked and the red indication is
not visible (5–Door).
If the red indication is visible behind
the push knob, it means the seatback
is not locked. If the vehicle is driven
without the seatback locked, it could
fold down suddenly and cause an
accident.

1. Locked position
2. Unlocked position
3. Red indication
Essential Safety Equipment
Seats
2-15
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