sensor MAZDA MODEL 3 HATCHBACK 2021 Owner's Manual

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.
 Any accessories which might
decrease the total seated weight on
the front passenger seat are attached
to the front passenger seat.
The front passenger front and side air
bags and knee air bags, and the seat
belt pretensioner system will
deactivate if the front passenger air
bag deactivation indicator light
illuminates.

Do not increase the total seated
weight on the front passenger seat:
When an infant or small child sits on
the front passenger seat, increasing the
total seated weight on the front
passenger seat is dangerous. The front
passenger seat we ight sensors will
detect the increased total seated
weight, which could result in the
unexpected deployment of the front
passenger front and side air bags and
knee air bags, and seat belt
pretensioner system in an accident and
may cause serious injury. Increasing the
total seated weight on the front
passenger seat could result in the front
passenger front and side air bags and
knee air bags, and seat belt
pretensioner system deployment in an
accident under the following
conditions, for example:
 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.
Essential Safety Equipment
SRS Air Bags
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A rear passenger steps on the front
passenger seat rails with their feet.
 Luggage or other items are placed on
the seatback or hung on the head
restraint.
 Heavy items are placed in the
seatback map pocket.
 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.
 Any accessories which might increase
the total seated weight on the front
passenger seat are attached to the
front passenger seat.
CAUTION
To assure proper deployment of the
front air bag and to prevent damage
to the sensors in the front seat
bottoms:
 Do not place sharp objects on the
front seat bottoms 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 2-47).
NOTE
The system requires about 10
seconds to alternate between turning
the front passenger front and side air
bags and knee air bags, and seat belt
pretensioner system on or o ff.
The front passenger air bag
deactivation indicator light may
illuminate 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
illuminate for 10 seconds if the total
seated weight on the front passenger
seat changes.
The air bag/front seat belt
pretensioner system warning light
might illuminate if the front
passenger seat receives a severe
impact.
If the front passenger air bag
deactivation indicator light does not
illuminate 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 illuminate, install the
child-restraint system on the rear seat
and consult an Authorized Mazda
Dealer as soon as possible.
Essential Safety Equipment
SRS Air Bags
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If the front passenger air bag
deactivation indicator light
illuminates when an adult is seated
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 still
illuminates, 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.
▼ Driver and Front Passenger Buckle
Switches
The buckle switches on the front seat
belts detect whether or not the front
seat belts are securely fastened and
further control the deployment of the
air bags.
Constant Monitoring
▼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 Driver and Front Passenger
Occupant Classification System)
Driver seat slide position sensorFront passenger occupant
classi fication sensor
Front passenger occupant
classi fication module
Front passenger air bag deactivation
indicator light
Front passenger seat belt buckle
switch

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.
Essential Safety Equipment
SRS Air Bags
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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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Operational Range
▼Operational Range
The system operates only when the
driver is in the vehicle or within
operational range while the key is
being carried.
NOTE
When the battery power is low, or in
places where there are high-intensity
radio waves or noise, the operational
range may become narrower or the
system may not operate. For
determining battery replacement,
Refer to Keyless Entry System on page
3-4.
▼Locking/Unlocking Using Touch
Sensor
1. Exterior antenna
2. 80 cm (31 in)
3. Operational range

NOTE
The system may not operate if you
are too close to the windows or door
handles.
If the key is left in the following areas
and you leave the vehicle, the doors
may be locked depending on the
radio wave conditions even if the key
is left in the vehicle.
Around the dashboardIn the storage compartments such
as the glove compartment or the
center console
On the rear parcel shelf (4–door)Next to a communication device
such as a mobile phone
▼
Locking Using Door-Lock Switch
(5–door)/Unlocking Using Electric
Opener
1. Exterior antenna
2. 80 cm (31 in)
3. Operational range
Before Driving
Advanced Keyless Entry System
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▼Unlocking with Auxiliary Key
Only the driver's door can be unlocked
using the auxiliary key.
Refer to Keys on page 3-2.
Insert the auxiliary key while the
driver's door handle is pulled and turn
the key to the unlock side. Turn the
auxiliary key back to its original
position before removing it.
NOTE
If you attempt to open the driver’s
door using an unauthorized auxiliary
key, the key cylinder will spin around
but the door will not unlock.
▼Locking , Unlocking with Touch
Sensor, Door Handle (With the
advanced keyless function)
By touching the sensing area of the
touch sensor, various locking/
unlocking operations can be done
without taking the key out of a bag or
pocket.
There are two types of touch sensors
used for locking and unlocking, and
each sensor is built into the outer door
handle on the driver and front
passenger's doors.
1. Sensing area of door lock touch
sensor (Depression on outer side of
door handle)
2. Sensing area of door release touch
sensor (Inner side of door handle)
NOTE
When locking/unlocking with the
transmitter carried, securely touch
the sensing area of the touch sensor
as follows.
Locking
Unlocking
The system may not operate normally
under the following conditions.
You touch the sensing area of the
door lock touch sensor and the
sensing area of the door release
touch sensor at the same time.
You touch the sensing area of the
touch sensor whil e wearing gloves.
Foreign matter such as snow or dirt
is stuck on the sensing area of the
touch sensor.
Before Driving
Doors and Locks
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You pull the door handle just after
touching the sensing area of the
touch sensor.
The system may operate if the outer
side door handle of a front door is
splashed with water by a car wash or
rain while the transmitter is in the
operation range.
If the system does not operate even
though you touch the sensing area of
the touch sensor correctly, release
the touch sensor once, and then
touch the sensing area of the touch
sensor again after waiting about 3
seconds.
Locking
When locking, touch the sensing area
of the door lock touch sensor with all
of the following conditions met.
The ignition is switched OFF.All the doors are closed.You are carrying the transmitter.
The following locations are locked by
touching the sensing area of the door
lock touch sensor.
All doorsFuel- filler lidLiftgate
When locking, the hazard warning
lights and sound operate one time.
Unlocking
When unlocking, touch the sensing
area of the door release touch sensor
with all of the following conditions
met.
The ignition is switched OFF.The driver’s door is locked.Three seconds or longer have passed
since the doors were locked.
You are carrying the transmitter.
(Unlocking from the driver's door)
The following locations are unlocked
by touching the sensing area of the
door release touch sensor of the
driver's door.
Driver’s doorFuel- filler lid
NOTE
The location to be unlocked can be
changed.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
When unlocking , the hazard warning
lights and sound operate two times.

(Unlocking from the front passenger’s
door)
The following locations are unlocked
by touching the sensing area of the
door release touch sensor of the front
passenger's door.
All doorsFuel- filler lidLiftgate
When unlocking , the hazard warning
lights and sound operate two times.
NOTE
Con firm that all the doors and
liftgate/trunk lid are securely locked.
For the liftgate/trunk lid, move it
without pressing the electric liftgate/
trunk lid opener to verify that the
liftgate/trunk lid has not been left
ajar.
Before Driving
Doors and Locks
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A beep sound is heard for
confirmation when the doors,
fuel- filler lid, and liftgate are locked/
unlocked using the touch sensor. 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.
(With theft-deterrent system)
The hazard warning lights flash when
the theft-deterrent system is armed
or turned o ff.
Refer to Theft-Deterrent System on
page 3-42.
The setting can be changed so that
the doors, fuel- filler lid, and liftgate
are locked automatically without
touching the sensing area of the
touch sensor.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
(Walk-away auto lock function)
A beep sound is heard when all
doors and the liftgate/trunk lid are
closed while the transmitter is being
carried. All the doors, fuel- filler lid,
and liftgate are locked automatically
when the transmitter is out of the
operational range. Also, the hazard
warning lights flash once. (Even if the
driver is in the operational range, all
the doors, fuel- filler lid, and liftgate
are locked automatically after about
30 seconds.) If you are out of the
operational range before the doors
and the liftgate/trunk lid are
completely closed or another
transmitter is left in the vehicle, the
walk-away auto lock function will
not work. Always make sure that all
doors and the liftgate/trunk lid are
closed and locked before leaving the
vehicle. The walk-away auto lock
function does not close the power
windows.
Before Driving
Doors and Locks
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(Auto re-lock function)
After unlocking with the touch
sensor, all the doors , fuel-filler lid,
and liftgate will automatically lock if
any of the following operations are
not performed within about 60
seconds.
Opening a door or the liftgate/
trunk lid.
Switching the ignition to any
position other than off.
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.
▼ Locking, Unlocking with
Tra n s m i t te r
The following locations can be locked/
unlocked by operating the keyless
entry system transmitter. Refer to
Keyless Entry System (page 3-4).
All doorsFuel-
filler lidLiftgate
▼Locking, Unlocking with
Door-Lock Switch
Door-lock switch on driver’s and front
passenger's door
The following locations are locked/
unlocked by pressing the door-lock
switch.
All doorsFuel-
filler lidLiftgate
Driver's door
1. Unlock
2. Lock
Front passenger's door
1. Unlock
2. Lock
Locking from the outside using the
door-lock switch
When locking from the outside using
the door-lock switch, press the lock
side of the door-lock switch with all of
the following conditions met and then
close all the doors.
The ignition is switched OFF.Any door is open.
Before Driving
Doors and Locks
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Fuel and Engine Exhaust Precautions
▼Fuel Requirements
Vehicles with catalytic converters or oxygen sensors must use ONLY UNLEADED
FUEL, which will reduce exhaust emissions and keep spark plug fouling to a
minimum.

To achieve maximum engine performance, use the
specified fuel.
Fuel
Octane Rating*1 (Anti-knock index)
Regular unleaded fuel 87 [(R+M)/2 method] or above (91 RON or above)
*1 U.S. federal law requires that octane ratings be posted on gas station pumps.
Fuel with a rating lower than 87 octane (91 RON) will negatively a ffect the emission
control system performance and could al so cause engine knocking and serious
engine damage.
CAUTION
 USE ONLY UNLEADED FUEL.
Leaded fuel is harmful to the catalytic converter and oxygen sensors and will lead
to deterioration of the emission control system and or failures.
 This vehicle can only use oxygenated fuels containing no more than 10 % ethanol
by volume. Damage to the vehicle may occur when ethanol exceeds this
recommendation, or if the gasoline cont ains any methanol. Stop using gasohol of
any kind if your vehicle engine is performing poorly.
 Never add fuel system additives other than a Mazda genuine product, otherwise
the emission control system could be damaged. Consult an Authorized Mazda
Dealer for details.
Gasoline blended with oxygenates such as alcohol or ether compounds are generally
referred to as oxygenated fuels. The comm on gasoline blend that can be used with
your vehicle is ethanol blended at no more than 10 %. Gasoline containing alcohol,
such as ethanol or methanol, may be marketed under the name "Gasohol".

Vehicle damage and drivability problems resulting from the use of the following may
not be covered by the warranty.
Gasohol containing more than 10 % ethanol.Gasoline or gasohol containing methanol.Leaded fuel or leaded gasohol.
Before Driving
Fuel and Emission
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