key battery MAZDA MODEL 3 4-DOOR 2018 Owners Manual

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.
CAUTION
 When operating a seat, be careful not to put yo ur 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.
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
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Keys
WA R N I N G
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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CAUTION
Radio equipment like this is governed by
laws in the United States.
Changes or modifications 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 (door/liftgate/trunk lid lock/
unlock) when the ignition is switched
off. The system does not operate if the
ignition is switched to any position other
than off.
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
6-35).
Battery life is about one year. Replace
the battery with a new one if the KEY
indicator light (green) flashes in the
instrument cluster. Replacing the battery
about once a year is recommended
because the KEY warning light/
indicator light may not illuminate or
flash 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.
▼Tr a n s m i t t e r
Operation b
uttons
Operation indicator light
NOTE
(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
3-43.
(With the advanced keyless function)
A beep sound can be heard for
confirmation when the doors and the
liftgate/trunk lid are locked/unlocked
using the key. If you prefer, the beep
sound can be turned off.
The volume of the beep sound can also
be changed.
Refer to Personalization Features on
page 9-12.
Use the following procedure to change the
setting.
1. Switch the ignition off and close all of the doors and the liftgate/trunk lid.
2. Open the driver's door.
Before Driving
Keys
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Advanced Keyless EntrySystem
*
WA R N I N G
Radio waves from the key may affect
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 affect the device.
The advanced keyless function allows you
to lock/unlock the door and the liftgate, or
open the liftgate/trunk lid while carrying
the key.

System malfunctions or warnings are
indicated by the foll owing warning beeps.
Request switch Inoperable Warning
Beep
Refer to Request Switch Inoperable
Warning Beep (With the advanced
keyless function) on page 7-39.
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 7-40.
Key Left-in-vehicle Warning Beep
Refer to Key Left-in-vehicle Warning
Beep (With the advanced keyless
function) on page 7-40.
NOTE
The advanced keyless entry system
functions can be deactivated to prevent
any possible adverse effect 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
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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 3-3.
▼Locking, Unlocking the Doors and
the Liftgate/Trunk Lid
Exterior antenna
Locking only
(5-door)
Operational range 80cm (31in)
80cm (31in)
NOTE
The system may not operate if you are
too close to the windows or door
handles, or liftgate.
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 th
e key is left in the
vehicle.
Around the dashboard
In the storage compartments such as
the glove compartment or the center
console
Next to a communication device such
as a mobile phone
▼ Opening the Liftgate/Trunk Lid
Exterior antenna
Operational range 80cm (31in)
Before Driving
Advanced Keyless Entry System
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NOTE
Always stop the engine and lock the
doors. In addition, to prevent theft of
valuables, do not leave them inside the
cabin.
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
Next to a communication device such
as a mobile phone
When the ignition is switched to ACC or
ON, the vehicle lock-out prevention
feature prevents you from locking
yourself out of the vehicle.
All doors and the liftgate/trunk lid will
automatically unlock if they are locked
using the power door locks with any
door open.
The vehicle lock-out prevention feature
does not operate while the ignition is
switched off.
When all doors and the liftgate/trunk lid
are locked using the power door lock
with any door or the liftgate/trunk lid
open, the closed doors and the liftgate/
trunk lid are locked. After that, when all
doors and the liftgate/trunk lid are
closed, all doors and the liftgate/trunk
lid are locked. However, if the key is
inside the vehicle, all doors and the
liftgate/trunk lid are automatically
unlocked.
(With the advanced keyless function)
The beep sound is heard for about 10
seconds to notify the driver that the key
has been left in the vehicle.
(Without the advanced keyless
function)
The horn sound is heard twice to notify
the driver that the key has been left in
the vehicle.
(Door unlock (control) system with
collision detection)
This system automatically unlocks the
doors and the liftgate/trunk lid in the
event the vehicle is involved in an
accident to allow passengers to get out
of the vehicle immediately and prevent
being trapped inside. While the ignition
is switched ON and in the event the
vehicle receives an impact strong
enough to inflate the air bags, all the
doors and the liftgate/trunk lid are
automatically unlocked after about 6
seconds have elapsed from the time of
the accident.
The doors and the liftgate/trunk lid may
not unlock depending on how an impact
is applied, the force of the impact, and
other conditions of the accident.
If door-related systems or the battery is
malfunctioning, the doors and the
liftgate/trunk lid will not unlock.
Before Driving
Doors and Locks
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▼Opening and Closing the Liftgate/
Trunk Lid
Opening the liftgate (5–door)
Using the electri
c liftgate opener
Unlock the doors and liftgate, then press
the electric liftgate op ener on the liftgate
and raise it when the latch releases.

Electric liftgate
opener
NOTE
(With the advanced keyless function)
A locked liftgate can also be opened
while the key is being carried.
When opening the liftgate with the doors
and the liftgate locked, it may require a
few seconds for the liftgate latch to
release after the electric liftgate opener
is pressed.
The liftgate can be closed when the
doors are locked with the key left in the
vehicle. However, to prevent locking the
key in the vehicle, the liftgate can be
opened by pressing the electric liftgate
opener. If the liftgate cannot be opened
despite doing this procedure, first push
the liftgate/trunk lid completely closed,
then press the electric liftgate opener to
fully open the liftgate.
When the liftgate latch is released by
pressing the electric liftgate opener, the
liftgate raises slightly. If the liftgate is
not operated for a certain period of
time, the liftgate cannot be raised.
To open
Press the electric liftgate/trunk lid
opener again.
To c l o s e
To close the liftgate/trunk lid from its
slightly raised position, open it first by
pressing the electric liftgate/trunk lid
opener, then close it after waiting at
least 1 second.
If the liftgate is not fully closed, the
driver is notified by a warning indicated
in the instrument cluster.
If the vehicle battery is dead or there is
a malfunction in the electrical system
and the liftgate cannot be unlocked, the
liftgate can be opened by performing the
emergency procedure.
Refer to When Liftgate/Trunk Lid
Cannot be Opened on page 7-43.
Opening the trunk lid (4–door)
Using the remote release button
Push the release button.

Before Driving
Doors and Locks
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Using the electric trunk lid opener
(With the advanced keyless function)
A trunk lid can also be opened while the
key is being carried.
Press the electric trunk lid opener on the
trunk lid, then raise the trunk lid when the
latch releases.

Electric trunk lid
opener
NOTE
When opening the trunk lid with the
doors locked, it may require a few
seconds for the trunk lid latch to release
after the electric trunk lid opener is
pressed.
The trunk lid can be closed when the
doors are locked with the key left in the
vehicle. However, to prevent locking the
key in the vehicle, the trunk lid can be
opened by pressing the electric trunk lid
opener. If the trunk lid cannot be opened
despite doing this procedure, press the
electric trunk lid opener to fully open
the trunk lid after pushing the trunk lid
completely closed.
If the vehicle battery is dead or there is
a malfunction in the electrical system
and the trunk lid cannot be unlocked,
the trunk lid can be opened by
performing the emergency procedure.
Refer to When Liftgate/Trunk Lid
Cannot be Opened on page 7-43.
Closing the liftgate/trunk lid
Lower the liftgate/trunk lid slowly using
the liftgate/trunk lid grip recess, then push
the liftgate/trunk lid closed using both
hands.
Do not slam it. Pull up on the liftgate/
trunk lid to make sure it is secure.
(5–door)

Liftgate grip
recess
(4–door)

Trunk lid grip recess
Before Driving
Doors and Locks
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Theft-Deterrent System*
If the theft-deterrent system detects an
inappropriate entry in to the vehicle, which
could result in the veh icle or its contents
being stolen, the alarm alerts the
surrounding area of an abnormality by
sounding the horn and flashing the hazard
warning lights.

The system will not function unless it's
properly armed. So when you leave the
vehicle, follow the arming procedure
correctly.
▼ Operation
System triggering conditions
The horn sounds intermittently and the
hazard warning lights flash for about 30
seconds when the system is triggered by
any one of the following:
Unlocking a door with the auxiliary key,
door lock switch, or an inside door-lock
knob.
Forcing open a door, the hood or the
liftgate/trunk lid.
Opening the hood by operating the hood
release handle.
Switching the ignition ON without using
the push button start.
If the system is triggered again, the lights
and horn will activat e until the driver's
door is unlocked wit h the transmitter.
(With the advanced keyless function)
The lights and horn can also be
deactivated by pressing the request switch
on a door.
NOTE
If the battery goes dead while the
theft-deterrent system is armed, the horn
will activate and the hazard warning
lights will flash when the battery is
charged or replaced.
▼ How to Arm the System
1. Close the windows and the moonroof*
securely.
2. Switch the ignition OFF.
3. Make sure the hood, the doors, and the liftgate/trunk lid are closed.
4. Press the lock button on the transmitter or lock the driver's door from the
outside with the auxiliary key.
The hazard warning lights will flash
once.
The following method will also arm
the theft-deterrent system:
Press the door-lock switch “
” while
any door is open and then close all of
the doors.
(With the advanced keyless function)
Press a request switch.

The security indicator light in the
instrument cluster flashes twice per
second for 20 seconds.
5. After 20 seconds, the system is fully
armed.
Before Driving
Security System
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Ignition Switch
▼Push Button Start Positions
The system operates only when the key is
within operational range.
Each time the push button start is pressed,
the ignition switches
in the order of off,
ACC, and ON. Pressing the push button
start again from ON switches the ignition
off.
Indicator light
Push b utton start
NOTE
The engine starts by pressing the push
button start while depressing the clutch
pedal (manual transaxle) or the brake
pedal (automatic transaxle). To switch
the ignition position, press the push
button start without depressing the
pedal.
Do not leave the ignition switched ON
while the engine is not running. Doing
so could result in the battery going
dead. If the ignition is left in ACC (For
automatic transaxle, the selector lever is
in the P position, and the ignition is in
ACC), the ignition switches off
automatically after about 25 minutes.
Off
The power supply to electrical devices
turns off and the push button start
indicator light (amber) also turns off.
WA R N I N G
Before leaving the driver's seat, always
switch the ignition off, set the parking
brake, and make sure the selector lever is in
P (automatic transaxle) or in 1st gear or R
(manual transaxle):
Leaving the driver's seat without switching
the ignition off, setting the parking brake,
and shifting the selector lever to P
(automatic transaxle) or to 1st gear or R
(manual transaxle) is dangerous.
Unexpected vehicle movement could occur
which could result in an accident.
In addition, if your intention is to leave the
vehicle for even a short period, it is
important to switch the ignition off, as
leaving it in another position will disable
some of the vehicle's security systems and
run the battery down.
ACC (Accessory)
Some electrical accessories will operate
and the indicator light (amber) illuminates.
NOTE
The keyless entry system does not function
while the push button start has been
pressed to ACC, and the doors will not
lock/unlock even if they have been locked
manually.
When Driving
Start/Stop Engine
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