MAZDA MODEL 3 HATCHBACK 2019 (in English) Service Manual

▼Front Shoulder Belt Adjuster
The front seat belts
have a front shoulder
belt adjuster. If the seat belt contacts your
neck or it slips off the shoulder, adjust the
seat belt height.
To r a i s e
To heighten the seat belt, move the front
shoulder belt adjuster upward.
To l o w e r
To lower the seat belt, lower it with the
knob of the front shoulder belt adjuster
pressed.

After adjusting, press the front shoulder
belt adjuster downward and make sure that
it is securely locked.
Seat Belt Warning Systems
▼ Seat Belt Warning Systems
If it detects that the occupant seat belt is
unfastened, the warning light or beep
alerts the occupant.
Refer to Seat Belt Wa
rning Indication/
Warning Light (Front seat) on page 7-34.
Refer to Seat Belt Warning Light (Rear
seat) (Red) on page 7-35.
Refer to Seat Belt Wa rning Beep on page
7-41.

Seat belt indicator light (rear seat)
(green)
The light turns on when the ignition is
switched ON and a rear seat belt is
fastened, and then it turns off after about
30 seconds.
Essential Safety Equipment
Seat Belt Systems
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Front Seat Belt
Pretensioner and Load Limiting Systems
▼Front Seat Belt
Pretensioner and
Load Limiting Systems
For optimum protection, the driver and
front passenger seat belts are equipped
with pretensioner and load limiting
systems. For both these systems to work
properly you must wear the seat belt
properly.

Pretensioners:
When a collision is detected, the
pretensioners deploy simultaneously with
the air bags.
For vehicles with t he front passenger
occupant classification system, the
pretensioners deploy simultaneously with
the air bags when a roll-over is also
detected.
For deployment details, refer to the SRS
Air Bag Deployment Criteria (page
2-68).

The seat belt retractors remove slack
quickly as the air bags are expanding. Any
time the air bags and seat belt
pretensioners have fired they must be
replaced.
A system malfunction or operation
conditions are indicated by a warning.
Refer to Air Bag/Front Seat Belt
Pretensioner System Warning Indication/
Warning Light on page 7-31.
Refer to Air Bag/Front Seat Belt
Pretensioner System Warning Beep on
page 7-41.
(With Front Passenger Occupant
Classification System)
In addition, the pretensioner system for the
front passenger, like the front and side
passenger air bag, is designed to only
deploy in accordance with the total seated
weight on the front passenger seat.
For details, refer to the front passenger
seat weight sensors (page 2-72).

Load limiter:
The load limiting system releases belt
webbing in a controlled manner to reduce
belt force on the occupant's chest. While
the most severe load on a seat belt occurs
in frontal collisions, th e load limiter has an
automatic mechanical function and can
activate in any accident mode with
sufficient occupant movement.
Even if the pretensioners have not fired,
the load limiting function must be checked
by an Authorized Mazda Dealer.
WA R N I N G
Wear seat belts only as recommended in
this owner's manual:
Incorrect positioning of the seat belts is
dangerous. Without pr oper positioning, the
pretensioner and load limiting systems
cannot provide adequate protection in an
accident and this could result in serious
injury. For more deta ils about wearing seat
belts, refer to "Fastening the Seat Belt"
(page 2-26).
Essential Safety Equipment
Seat Belt Systems
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Have your seat belts changed immediately
if the pretensioner or load limiter has been
expended:
Always have an Authorized Mazda Dealer
immediately inspect the seat belt
pretensioners and air bags after any
collision. Like the air bags, the seat belt
pretensioners and load limiters will only
function once and must be replaced after
any collision that caused them to deploy. A
seat belt with an expended pretensioner or
load limiter is still better than wearing no
seat belt at all; however, if the seat belt
pretensioners and load limiters are not
replaced, the risk of injury in a collision will
increase.
Do not modify the components or wiring,
or use electronic testing devices on the
pretensioner system:
Modifying the components or wiring of the
pretensioner system, including the use of
electronic testing devices is dangerous. You
could accidentally activate it or make it
inoperable which would prevent it from
activating in an accident. The occupants or
repairers could be seriously injured.
Properly dispose of the pretensioner
system:
Improper disposal of the pretensioner
system or a vehicle with non-deactivated
pretensioners is dangerous. Unless all
safety procedures are followed, injury could
result. Have an Authorized Mazda Dealer
safely dispose of the pretensioner system or
scrap a pretensioner system equipped
vehicle.NOTE
The pretensioner system may not
operate depending on the type of the
collision. For details, refer to the SRS
Air Bag Deployment Criteria (page
2-68).
Some smoke (non-toxic gas) will be
released when the air bags and
pretensioners deploy. This does not
indicate a fire. This gas normally has no
effect on occupants, however, those with
sensitive skin may experience light skin
irritation. If residue from the
deployment of the air bags or the
pretensioner system gets on the skin or
in the eyes, wash it off as soon as
possible.
Essential Safety Equipment
Seat Belt Systems
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Seat Belt Extender
▼Seat Belt Extender
If your seat belt is not long enough, even
when fully extended, a seat belt extender
may be available to you at no charge from
your Authorized Mazda Dealer.
This extender will be only for you and for
the particular vehicle and seat. Even if it
plugs into other seat b
elts, it may not hold
in the critical mom ent of a crash.
When ordering an extender, only order one
that provides the necessary additional
length to fasten the seat belt properly.
Please contact your Authorized Mazda
Dealer for more information.
WA R N I N G
Do not use a seat belt extender unless it is
necessary:
Using a seat belt extender when not
necessary is dangerous. The seat belt will
be too long and not fit properly. In an
accident, the seat belt will not provide
adequate protection and you could be
seriously injured. Only use the extender
when it is required to fasten the seat belt
properly.
Do not use an improper extender:
Using a seat belt extender that is for
another person or a different vehicle or seat
is dangerous. The seat belt will not provide
adequate protection and the user could be
seriously injured in an accident. Only use
the extender provided for you and for the
particular vehicle and seat. NEVER use the
extender in a different vehicle or seat. If you
sell your Mazda, do not leave your seat belt
extender in the vehicle. It could be used
accidentally by the new owner of the
vehicle. After removing the seat belt
extender, discard it. Never use the seat belt
extender in any other vehicle you may own
in the future.
Do not use an extender that is too long:
Using an extender that is too long is
dangerous. The seat belt will not fit
properly. In an accident, the seat belt will
not provide adequate protection and you
could be seriously injured. Do not use the
extender or choose one shorter in length if
the distance between the extender's buckle
and the center of the user's body is less
than 15 cm (6 in).
Essential Safety Equipment
Seat Belt Systems
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Do not leave a seat belt extender
connected to the buckle:
Leaving a seat belt extender connected to
the buckle without using the seat belt is
dangerous. When the seat belt extender is
connected to the driver's seat belt buckle
(or front passenger's seat belt buckle), the
SRS driver's (or front passenger's) air bag
system will determine that the driver (or
front passenger) is wearing the seat belt
even if the driver (or front passenger) is not
wearing it. This condition could cause the
driver's (or front passenger's) air bag to not
activate correctly and result in death or
serious injury in the event of collision.
Always wear the seat belt with the seat belt
extender.
Do not use the seat belt extender when
installing a child-restraint system on the
front or rear passenger seat:
Using a seat belt extender to fasten a
child-restraint system on any seat is
dangerous. Always follow the
child-restraint system manufacturer's
installation instructions and never use a
seat belt extender.
NOTE
When not in use, remove the seat belt
extender and store it in the vehicle. If the
seat belt extender is left connected, the
seat belt extender might get damaged as it
will not retract with the rest of the seat belt
and can easily fall out of the door when
not in use and be damaged. In addition,
the seat belt warning light will not
illuminate and function properly.
Essential Safety Equipment
Seat Belt Systems
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Child-RestraintPrecautions
▼ Child-Restraint Precautions
Mazda strongly urges the use of
child-restraint system
s for children small
enough to use them.

You are required by law to use a
child-restraint system for children in the
U.S. and Canada.
Check your local and state or provincial
laws for specific requirements regarding
the safety of childr en riding in your
vehicle.

Whatever child-rest raint system you
consider, please pick the appropriate one
for the age and size of the child, obey the
law and follow the i nstructions that come
with the individual ch ild-restraint system.

A child who has outgrown child-restraint
systems should sit in the rear and use seat
belts, both lap an d shoulder. If the
shoulder belt crosses the neck or face,
move the child closer to the center of the
vehicle in the outboard seats, and towards
the buckle on the right if the child is
seated on the center seat.

Statistics confirm that the rear seat is the
best place for all children up to 12 years of
age, and more so with a supplemental
restraint system (air bags).

A rear-facing child-restraint system should
NEVER be used on the front seat with the
air bag system activated. The front
passenger's seat is also the least preferred
seat for other child-restraint systems.

(With Front Passenger Occupant
Classification System)
To reduce the chance of injuries caused by
deployment of the front passenger air bag,
the front passenger seat weight sensors
occupant classification sensor works as a
part of the supplementa l restraint system.
This system deactivates the front
passenger front and side air bags and knee
air bags, and also the front passenger seat
belt pretensioner system when the front
passenger air bag deactivation indicator
light illuminates.

When an infant or small child sits on the
front passenger seat, the system shuts off
the front passenger front and side air bags
and knee air bags, and seat belt
pretensioner system, so make sure the
front passenger air bag deactivation
indicator light illuminates.

Even if the front passenger air bag is shut
off, Mazda strongly recommends that
children be prope rly restrained and
child-restraint systems of all kinds are
properly secured on the rear seats which
are the best place for children.

For more details, refer to "Front passenger
seat weight sensors" (page 2-72).

Essential Safety Equipment
Child Restraint
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WA R N I N G
Use the correct size child-restraint system:
For effective protection in vehicle accidents
and sudden stops, a child must be properly
restrained using a seat belt or
child-restraint system depending on age
and size. If not, the child could be seriously
injured or even killed in an accident.
Follow the manufacturer's instructions and
always keep the child-restraint system
buckled down:
An unsecured child-restraint system is
dangerous. In a sudden stop or a collision it
could move causing serious injury or death
to the child or other occupants. Make sure
any child-restraint system is properly
secured in place according to the
child-restraint system manufacturer's
instructions. When not in use, remove it
from the vehicle or fasten it with a seat belt,
or attach it to BOTH ISOFIX/LATCH
*1 lower
anchors for ISOFIX/LATCH
*1 child-restraint
systems and the corresponding tether
anchor.
*1 ISOFIX (Mexico)/LATCH (Except Mexico)
Always secure a child in a proper
child-restraint system:
Holding a child in your arms while the
vehicle is moving is extremely dangerous.
No matter how strong the person may be,
he or she cannot hold onto a child in a
sudden stop or collision and it could result
in serious injury or death to the child or
other occupants. Even in a moderate
accident, the child may be exposed to air
bag forces that could result in serious injury
or death to the child, or the child may be
slammed into an adult, causing injury to
both child and adult.
Never use a rear-facing child-restraint
system in the front seat with an air bag
that could deploy:
Rear-facing child-restraint systems on the
front seat are particularly dangerous even
though you may feel assured that a front
passenger air bag will not deploy based on
the fact that the front passenger air bag
deactivation indicator light illuminates.
The child-restraint system can be hit by a
deploying air bag and moved violently
backward resulting in serious injury or
death to the child.
Essential Safety Equipment
Child Restraint
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(Mexico)
NEVER use a rearward facing child restraint
on a seat protected by an ACTIVE AIRBAG in
front of it, DEATH or SERIOUS INJURY to the
CHILD can occur.
Vehicles with a front passenger air bag
have the following warning label. The
warning label reminds you not to put a
rear-facing child-restraint system on the
front passenger seat at any time.

(Except Mexico)
Vehicles with a front passenger air bag
have the following warning label. The
warning label reminds you not to put a
rear-facing child-restraint system on the
front passenger seat at any time.
Do not install a front-facing child-restraint
system on the front passenger seat unless it
is unavoidable:
In a collision, the force of a deploying air
bag could cause serious injury or death to
the child. If installing a front-facing
child-restraint system on the front
passenger seat is unavoidable, move the
front passenger seat as far back as
possible.
Seating a child in a child-restraint system
on the front passenger seat is dangerous
under certain conditions (With Front
Passenger Occupant Classification System):
Your vehicle is equipped with front
passenger seat weight sensors. Even with
the front passenger seat weight sensors, if
you must use the front passenger seat to
seat a child, using a child-restraint system
on the front passenger seat under the
following conditions increases the danger
of the front passenger air bag deploying
and could result in serious injury or death
to the child.
The front passenger air bag deactivation
indicator light does not illuminate when
seating a child in the child-restraint
system.
Essential Safety Equipment
Child Restraint
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Luggage or other items are placed on the
seat with the child in the child-restraint
system.
 A rear passenger or luggage pushing or
pulling down on the front passenger
seatback.
 Luggage or other items are placed on the
seatback or hung on the head restraint.
 The seat is washed.
 Liquids are spilled on the seat.
 The front passenger seat is moved
backward, pushing into luggage or other
items placed behind it.
 The front passenger seatback contacts
the rear seat.
 Luggage or other items are placed
between the front passenger seat and
driver seat.
 An electric device is put on the front
passenger's seat.
 An additional electrical device, such as a
seat warmer is installed to the surface of
the front passenger seat.
 Any accessories, which might increase
the total seated weight on the front
passenger seat, are attached to the front
passenger seat.
The designated positions with seat belts on
the rear seats are the safest places for
children. Always use seat belts and child
restraints.Do not allow a child or anyone to lean over
or against the side window of a vehicle
with side and curtain air bags:
It is dangerous to allow anyone to lean
over or against the side window, the area
of the front passenger seat, the front and
rear window pillars and the roof edge
along both sides from which the side and
curtain air bags deploy, even if a
child-restraint system is used. The impact
of inflation from a side or curtain air bag
could cause serious injury or death to an
out of position child. Furthermore, leaning
over or against the front door could block
the side and curtain air bags and eliminate
the advantages of supplemental
protection. With the front air bag and the
additional side air bag that comes out of
the front seat, the rear seat is always a
better location for children. Take special
care not to allow a child to lean over or
against the side window, even if the child is
seated in a child-restraint system.
Never use one seat belt on more than one
person at a time:
Using one seat belt for more than one
person at a time is dangerous. A seat belt
used in this way cannot spread the impact
forces properly and the two passengers
could be crushed together and seriously
injured or even killed. Never use one belt for
more than one person at a time and always
operate the vehicle with each occupant
properly restrained.
Essential Safety Equipment
Child Restraint
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CAUTION
A seat belt or child-restraint system can
become very hot in a closed vehicle during
warm weather. To avoid burning yourself
or a child, check them before you or your
child touches them.
NOTE
Your Mazda is equipped with ISOFIX/
LATCH
*1 lower anchors for attachment of
specially design ed ISOFIX/LATCH
*1
child-restraint systems on the rear seats.
When using these anchors to secure a
child-restraint system, refer to "Using
ISOFIX Lower Anchor (Mexico)/Using
LATCH Lower Anchor (Except Mexico)"
(page 2-50).
*1 ISOFIX (Mexico)/LATCH (Except
Mexico)
Essential Safety Equipment
Child Restraint
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