Mazda 3 Hatchback (2018 year). Manual

How the SRS Air Bags Work

Your Mazda is equipped with the following types of SRS air bags. SRS air bags are
designed to work together with the seat belts to help to reduce injuries during an accident.
The SRS air bags are designed to provide further protection for passengers in addition to the
seat belt functions. Be sure to wear seat belts properly.

▼ Front Seat Belt Pretensioners

The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near
frontal collisions.
In addition, the pretensioners operate when a side collision (only on the side in which the
collision occurs) or a roll-over accident is detected. The pretensioners operate differently
depending on what types of air bags are equipped. For more details about seat belt
pretensioner operation, refer to the SRS Air Bag Deployment Criteria (page 2-58).

▼ Driver Air Bag

The driver's air bag is mounted in the steering wheel.
When air bag crash sensors detect a frontal impact of greater than moderate force, the
driver's air bag inflates quickly helping to reduce injury mainly to the driver's head or chest
caused by directly hitting the steering wheel.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-58).
(With Front Passenger Occupant Classification System)
The driver's dual-stage air bag controls air bag inflation in two energy stages. During an
impact of moderate severity, the driver's air bag deploys with lesser energy, whereas during
more severe impacts, it deploys with more energy.

SRS Air Bags

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▼ Front Passenger Air Bag

The front passenger air bag is mounted in the front passenger dashboard.
The inflation mechanism for the front passenger air bag is the same as the driver's air bag.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-58).
(With Front Passenger Occupant Classification System)
In addition, the front passenger air bag is designed to only deploy when the front passenger
occupant classification sensor detects a passenger sitting on the front passenger's seat. For
details, refer to the front passenger occupant classification system (page 2-61).

Essential Safety Equipment

SRS Air Bags

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▼ Side Air Bags

The side air bags are mounted in the outboard sides of the front seatbacks.
When the air bag crash sensors detect a side impact of greater than moderate force, the
system inflates the side air bag only on the side in which the vehicle was hit. The side air
bag inflates quickly to reduce injury to the driver or front passenger's chest caused by
directly hitting interior parts such as a door or window.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-58).
(With Front Passenger Occupant Classification System)
In addition, the front passenger side bag is designed to only deploy when the front passenger
occupant classification sensor detects a passenger sitting on the front passenger's seat. For
details, refer to the front passenger occupant classification system (page 2-61).

SRS Air Bags

*Some models.

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▼ Curtain Air Bags

The curtain air bags are mounted in the front and rear window pillars, and the roof edge
along both sides.
When the air bag crash sensors detect a side impact of greater than moderate force, the
curtain air bag inflates quickly and helps to reduce injury mainly to the rear outboard
passenger's head caused by directly hitting interior parts such as a door or window.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-58).
In a side impact:
Greater than moderate impact to one side of the vehicle will cause the curtain air bag on that
side only to inflate.

Only one side curtain air bag will deploy on the
side of the vehicle that receives the force of an
impact.

(With Front Passenger Occupant Classification System)
In a roll-over:
In response to a vehicle roll-over, both curtain air bags inflate.

Both curtain air bags will deploy after
the roll-over accident is detected.

Essential Safety Equipment

SRS Air Bags

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*Some models.

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SRS Air Bag Deployment Criteria

This chart indicates the applicable SRS equipment that will deploy depending on the type of
collision.
(The illustrations are the representative cases of collisions.)

SRS equip-

ment

Types of collision

A severe frontal/near frontal colli-

sion

A severe side colli-

sion

A roll-over/near

roll-over

A rear collision

Front seat

belt preten-

sioner

(both sides)

(impact side

only)

(both sides)

No air bag and
front seat belt pre-
tensioner will be
activated in a rear
collision.

Driver air

bag

Front pas-

senger air

bag

Side air bag

(impact side

only)

Curtain air

bag

X (impact side on-

ly)

X (both sides)

X: The SRS air bag equipment is designed to deploy in a collision.

1 (With Front Passenger Occupant Classification System)

The front passenger front and side air bags and the seat belt pretensioner are designed to deploy when the front
passenger occupant classification sensor detects a passenger sitting on the front passenger's seat.

2 (With Front Passenger Occupant Classification System)

In an angled collision, the side air bag and curtain air bag may deploy.

3 (With Front Passenger Occupant Classification System)

In a roll-over accident, the seat belt pretensioners and the curtain air bags deploy.

4 (With Side/Curtain Air Bags)

In a side collision, the seat belt pretensioners and the side/curtain air bags deploy (only on the side in which the
collision occurs).

Essential Safety Equipment

SRS Air Bags

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*Some models.

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Limitations to SRS Air Bag

In severe collisions such as those described previously in "SRS Air Bag Deployment
Criteria", the applicable SRS air bag equipment will deploy. However, in some accidents,
the equipment may not deploy depending on the type of collision and its severity.

Limitations to front/near front collision detection:
The following illustrations are examples of front/near front collisions that may not be
detected as severe enough to deploy the SRS air bag equipment.

Impacts involving trees or poles

Frontal offset impact to the vehicle

Rear-ending or running under a truck's tail gate

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Limitations to side collision detection:
The following illustrations are examples of side collisions that may not be detected as
severe enough to deploy the SRS air bag equipment.

Side impacts involving trees or poles

Side impacts with two-wheeled vehicles

Roll-over (Without Front Passenger Occupant Classification System)

(With Front Passenger Occupant Classification System)
Limitations to roll-over detection:
The following illustration is an example of an accident that may not be detected as a
roll-over accident. Therefore, the front seat belt pretensioners and curtain air bags may not
deploy.

Pitch end over end

Essential Safety Equipment

SRS Air Bags

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Front Passenger Occupant Classification System

First, please read "Supplemental Restraint System (SRS) Precautions" (page 2-44) carefully.

▼ Front Passenger Occupant Classification Sensor

Your vehicle is equipped with a front passenger occupant classification sensor as a part of
the supplemental restraint system. This sensor is equipped in the front passenger's seat
cushion. This sensor measures the electrostatic capacity of the front passenger's seat. The
SAS unit is designed to prevent the front passenger front and side air bags and seat belt
pretensioner system from deploying if the front passenger air bag deactivation indicator
light turns on.
To reduce the chance of injuries caused by deployment of the front passenger air bag, the
system deactivates the front passenger front and side air bags and also the seat belt
pretensioner system when the front passenger air bag deactivation indicator light turns on.
Refer to the following table for the front passenger air bag deactivation indicator light
illumination conditions.

This system shuts off the front passenger front and side air bags and seat belt pretensioner
system, so make sure the front passenger air bag deactivation indicator light turns on
according to the following table.

The air bag/front seat belt pretensioner system warning light flashes and the front passenger
air bag deactivation indicator light illuminates if the sensors have a possible malfunction. If
this happens, the front passenger front and side air bags and seat belt pretensioner system
will not deploy.

Front passenger air bag deactivation indicator light

This indicator light turns on to remind you that the front passenger front and side air bags
and seat belt pretensioner will not deploy during a collision.

If the front passenger occupant classification sensor is normal, the indicator light turns on
when the ignition is switched ON. The light turns off after a few seconds. Then, the
indicator light turns on or is off under the following conditions:

SRS Air Bags

*Some models.

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Front passenger air bag deactivation indicator light on/off condition chart

Condition detected by the front

passenger occupant classifica-

tion system

Front passenger air

bag deactivation indi-

cator light

Front passenger front

and side air bags

Front passenger seat

belt pretensioner sys-

tem

Empty (Not occupied)

Deactivated

A child less than 1 year old is
seated in a child-restraint system

Deactivated

Child

On or off

Deactivated or ready

Adult

Off

Ready

1 The occupant classification sensor may not detect a child seated on the seat, in a child-restraint system, or a

junior seat depending on the child's physical size and seated posture.

2 If a smaller adult sits on the front passenger seat, the sensors might detect the person as being a child

depending on the person's physique.

The curtain air bag is ready for inflating regardless of what the front passenger air bag
deactivation indicator light on/off condition chart indicates.
If the front passenger air bag deactivation indicator light does not turn on when the ignition
is switched ON and does not turn on as indicated in the front passenger air bag deactivation
indicator light on/off condition chart, do not allow an occupant to sit in the front passenger
seat and consult an Authorized Mazda Dealer as soon as possible. The system may not work
properly in an accident.

WARNING

Do not allow an occupant in the front passenger's seat to sit with a posture which makes it
difficult for the front passenger occupant classification sensor to detect the occupant
correctly:
Sitting in the front passenger's seat with a posture which makes it difficult for the front
passenger occupant classification sensor to detect the occupant correctly is dangerous. If the
front passenger occupant classification sensor cannot detect the occupant sitting on the front
passenger's seat correctly, the front passenger front and side air bags and pretensioner system
may not operate (non-deploy) or they may operate (deploy) accidentally. The front passenger
will not have the supplementary protection of the air bags or the accidental operation
(deployment) of the air bags could result in serious injury or death.
Under the following conditions, the front passenger occupant classification sensor cannot
detect a passenger sitting on the front passenger's seat correctly and the deployment/
non-deployment of the air bags cannot be controlled as indicated in the front passenger air
bag deactivation indicator light on/off condition chart. For example:

Essential Safety Equipment

SRS Air Bags

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A front passenger is seated as shown in the following figure:

A rear passenger pushes up on the front passenger seat with their feet.
Luggage or other items placed under the front passenger seat or between the front

passenger seat and driver seat that push up the front passenger seat bottom.

An object, such as a seat cushion, is put on the front passenger's seat or between the

passenger's back and the seatback.

A seat cover is put on the front passenger's seat.
Luggage or other items are placed on the seat with the child in the child-restraint system.
A rear passenger or luggage push or pull 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.

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The front passenger front and side air bags and seat belt pretensioner systems will deactivate
if the front passenger air bag deactivation indicator light turns on.

CAUTION

To assure proper deployment of the front air bag and to prevent damage to the sensor in

the front seat cushion:

Do not place sharp objects on the front seat cushion or leave heavy luggage on them.
Do not spill any liquids on the front seats or under the front seats.

To allow the sensors to function properly, always perform the following:

Adjust the front seats as far back as possible and always sit upright against the seatbacks

with seat belts worn properly.

If you place your child on the front passenger seat, secure the child-restraint system

properly and slide the front passenger seat as far back as possible (page 2-33).

NOTE



The system requires about 10 seconds to alternate between turning the front passenger
front and side air bags and seat belt pretensioner system on or off.



The front passenger air bag deactivation indicator light may turn on repeatedly if luggage
or other items are put on the front passenger seat, or if the temperature of the vehicle's
interior changes suddenly.



The front passenger air bag deactivation indicator light may turn on for 10 seconds if the
electrostatic capacity on the front passenger seat changes.



The air bag/front seat belt pretensioner system warning light might turn on if the front
passenger seat receives a severe impact.



If the front passenger air bag deactivation indicator light does not turn on after installing
a child-restraint system on the front passenger seat, first, re-install your child-restraint
system according to the procedure in this owner's manual. Then, if the front passenger air
bag deactivation indicator light still does not turn on, install the child-restraint system on
the rear seat and consult an Authorized Mazda Dealer as soon as possible.



If the front passenger air bag deactivation indicator light turns on when an occupant is
seated directly in the front passenger seat, have the passenger re-adjust their posture by
sitting with their feet on the floor, and then re-fastening the seat belt. If the front
passenger air bag deactivation indicator light remains turned on, move the passenger to
the rear seat. If sitting in the rear seat is not possible, slide the front passenger seat as far
back as possible. Consult an Authorized Mazda Dealer as soon as possible.

Essential Safety Equipment

SRS Air Bags

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Constant Monitoring

The following components of the air bag systems are monitored by a diagnostic system:



Front air bag sensors



Crash sensors, and diagnostic module (SAS unit)



Side crash sensors



Air bag modules



Front seat belt pretensioners



Air bag/Front seat belt pretensioner system warning light



Related wiring

(With Front Passenger Occupant Classification System)



Front passenger occupant classification sensor



Front passenger occupant classification module



Front passenger air bag deactivation indicator light

The diagnostic module continuously monitors the system's readiness. This begins when the
ignition is switched ON and continues while the vehicle is being driven.

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Before Driving

Use of various features, including keys, doors, mirrors and windows.

Keys.................................................... 3-2

Keys..............................................3-2
Keyless Entry System...................3-3

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...................... 3-20
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.............. 3-28

Steering Wheel.................................3-30

Steering Wheel........................... 3-30

Mirrors............................................. 3-32

Mirrors........................................3-32

Windows........................................... 3-35

Power Windows..........................3-35
Moonroof

.................................. 3-38

Security System............................... 3-41

Modification and Add-On
Equipment...................................3-41
Immobilizer System....................3-41
Theft-Deterrent System

.............3-43

Driving Tips..................................... 3-45

Break-In Period.......................... 3-45
Saving Fuel and Protection of the
Environment............................... 3-45
Hazardous Driving......................3-46
Floor Mat.................................... 3-46
Rocking the Vehicle....................3-47
Winter Driving............................3-48
Driving In Flooded Area............ 3-50
Overloading................................ 3-50
Driving on Uneven Road............3-51

Towing.............................................. 3-52

Trailer Towing............................ 3-52
Recreational Towing...................3-52

*Some models.

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Keys

WARNING

Do not leave the key in your vehicle with
children and keep them in a place where
your children will not find 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 is carried with communication

devices such as cellular phones.

The key contacts or is covered by a

metal object.

The key 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 near electronic devices such as
televisions or personal computers.

To avoid damage to the key (transmitter),

DO NOT:

Drop the key.
Get the key wet.
Disassemble the key.
Expose the key to high temperatures

on places such as the dashboard or
hood, under direct sunlight.

Expose the key to any kind of magnetic

field.

Place heavy objects on the key.
Put the key in an ultrasonic cleaner.
Put any magnetized objects close to

the key.

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
your Authorized Mazda Dealer and have
your code number ready.

NOTE
The driver must carry the key to ensure the
system functions properly.

Auxiliary key

Transmitter

Key code number plate

Before Driving

Keys

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Mazda 3 Hatchback (2018 year). Manual - part 4