2021 MAZDA MODEL CX-3 key battery

The system does not operate and the
operation indicator light on the
transmitter does not flash when the
buttons are pressed.
The system's operational range is
reduced.
Replacing the battery at an Authorized
Mazda Dealer, is recommended to prevent
damage to the key. If replacing the battery
by yourself, follow the instruction.
Replacing the key battery
1. Remove the lower cover while pressing the knob in the direction of
the arrow.
2. Press in the tab to unlock the upper
cover.
3. Insert a tape-wrapped flatheadscrewdriver into the gap and slide it in
the direction of the arrow.
4. Twist the flathead screwdriver in thedirection of the arrow and remove the
upper cover.
5. Remove the cap using the
tape-wrapped flat head screwdriver.
6. Remove the battery using
tape-wrapped flat head screwdriver.
Maintenance and Care
Owner Maintenance
6-35
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00

KEY Warning Light
Take the appropriate action and verify that the warning light turns off.
SignalCause Action to be taken
(Red)
(Flashing) The advanced key battery is dead. Replace the key battery (page 6-34).
The advanced key is
not within the opera‐
tion range. Bring the advanced key into the operation
range (page 3-8).
The advanced key is placed in areas inside
the cabin where it is difficult for the key to
be detected.
A key from another manufacturer similar to
the advanced key is in the operation range. Take the key from another manufacturer
similar to the advanced key out of the op
‐
eration range.
Without the ignition switched off, the ad ‐
vanced key is taken out of the cabin, and
then all the doors are closed. Bring the advanced ke
y back into the cab‐
in.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-39
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00

NOTE
To allow the front passenger occupant
classification sensor to function
properly, do not place and sit on an
additional seat cushion on the front
passenger's seat. The sensor may not
function properly because the additional
seat cushion could cause sensor
interference.
If a small child is seated on the front
passenger's seat, the warning beep may
not operate.
Mexico
If the vehicle speed exceeds about 20
km/h (12 mph) with the driver or front
passenger's seat belt unfastened, a warning
beep sounds continuously. If the seat belt
remains unfastened, the beep sound stops
once and then cont inues for about 90
seconds. The beep stops after the driver or
front passenger's seat belt is fastened.
Until a seat belt is fastened or a given
period of time has elapsed, the beep sound
will not stop even if the vehicle speed falls
below 20 km/h (12 mph).
NOTE
Placing heavy items on the front
passenger's seat may cause the front
passenger's seat belt warning function
to operate depending on the weight of
the item.
To allow the front passenger seat weight
sensor to function properly, do not place
and sit on an additional seat cushion on
the front passenger's seat. The sensor
may not function properly because the
additional seat cushion could cause
sensor interference.
If a small child is seated on the front
passenger's seat, the warning beep may
not operate.
▼ Ignition Not Switched Off (STOP)
Warning Beep
If the driver's door is opened with the
ignition switched to ACC, a beep will be
heard continuously in the cabin to notify
the driver that the ignition has not been
switched OFF (STOP). Under this
condition, the keyless entry system will
not operate, the vehicle cannot be locked,
and the battery voltage will be depleted.
▼Key Removed from Vehicle Warning
Beep
Vehicles with advanced keyless function
If the key is taken out of the vehicle while
the ignition is not switched OFF and all
the doors are closed, the beep which
sounds outside of the vehicle will be heard
6 times, the beep which sounds inside the
vehicle will be
heard 6 times.
Vehicles without advanced keyless
function
If the key is taken out of the vehicle while
the ignition is not switched OFF and all
the doors are closed, a beep will be heard
in the cabin 6 times.
NOTE
Because the key utilizes low-intensity
radio waves, the Key Removed From
Vehicle Warning may activate if the key is
carried together with a metal object or it
is placed in a poor si gnal reception area.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-43
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00

Index
A
Accessory Socket............................ 5-144
Active Driving Display..................... 4-18
Adaptive Front Lighting System
(AFS)................................................. 4-78
Add-On Non-Genuine Parts and
Accessories........................................ 8-19
Advanced Key
Advanced keyless entry system..... 3-9
Operational range........................ 3-10
Advanced Smart City Brake Support
(Advanced SCBS)........................... 4-116
Collision warning.... .................. 4-118
Smart City Brake Support (SCBS)
Indicator Light (Red)................. 4-118
Stopping the Advanced Smart City
Brake Support (Advanced SCBS)
system operation........................ 4-118
Air Bag Systems............................... 2-51
Air Bag/Front Seat Belt Pretensioner
System Warning Beep....................... 7-42
Ambient Temperature Display.......... 4-15
Antilock Brake System (ABS).......... 4-65
Audio Control Switch
Adjusting the Volume.................. 5-16
Seek Switch................................. 5-16
Audio Set [Type A (non-touchscreen)] AUX.............................................5-24
Bluetooth®.................................. 5-31
Clock............................................5-22
Error Indications.......................... 5-30
iPod mode....................................5-28
Power/Volume/Sound Controls... 5-20
Radio............................................5-23
Troubleshooting.......... ................. 5-59
USB............................................. 5-25
Voice Recognition.... ................... 5-55
Audio Set [Type B (touchscreen)]
Android Auto™........................... 5-91
Apple CarPlay............................. 5-85
Applications............................... 5-126
AUX.............................................5-79
Bluetooth®.................................. 5-95
Radio............................................5-71
Satellite Radio........ ..................... 5-75
Settings...................................... 5-123
Troubleshooting........... .............. 5-127
USB............................................. 5-80
Voice Recognition..................... 5-120
Volume/Display/Sound
Controls....................................... 5-68
Audio System Antenna........................................5-19
Appendix................................... 5-135
Audio Control Switch................. 5-16
Audio Set [Type A (non-
touchscreen)]............................... 5-20
Audio Set [Type B
(touchscreen)].............................. 5-63
AUX/USB mode..........................5-17
Before Using the Audio
System......................................... 5-16
AUTOHOLD..................................... 4-59
AUTOHOLD Warning Beep.............7-44
Automatic Transaxle Active Adaptive Shift (AAS)...... 4-31
Automatic transaxle controls....... 4-29
Direct mode................................. 4-38
Driving tips..................................4-39
Manual shift mode.......................4-32
Shift-lock system...... ................... 4-30
Transaxle ranges.......................... 4-30
B
Battery............................................... 6-32 Maintenance.................................6-34
Replacement................................ 6-34
Specifications.................................9-4
Battery runs out.................................7-17 Jump-Starting...............................7-17
10-2
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00

Index
Key battery replacement..............6-34
Opening the Hood....................... 6-19
Owner Maintenance
Precautions...................................6-17
P
Parking Brake....................................4-55
Personalization Features..................... 9-9
Power Steering.................................. 4-74
Power steering warning buzzer......... 7-44
Power Windows............. ................... 3-30
R
Radar Sensors (Rear)...................... 4-134
Radar Sensor (Front).......................4-131
Rearview Mirror........ ........................3-29
Rear Coat Hooks............................. 5-150
Rear Cross Traffic Alert (RCTA).... 4-101
Rear Door Child Safe ty Locks.......... 3-19
Rear Seat........................................... 2-14
Rear View Monitor......................... 4-144 Displayable range on the
screen......................................... 4-146
Picture quality adju stment......... 4-150
Rear view monitor operation..... 4-147
Rear view parking camera
location...................................... 4-145
Switching to the rear view monitor
display........................................4-145
Variance between actual road
conditions and displayed
Image......................................... 4-149
Viewing the display................... 4-147
Rear Window Defogger .................... 4-52
Rear Window Washer....................... 4-51
Rear Window Wiper.... ..................... 4-51
Recommended Oil.............................6-22
Recording of Vehicle Data................ 8-22
Recreational Towing......................... 3-47
Registering Your Vehicle in A Foreign
Country.............................................. 8-18
Replacement Fuse..............................................6-47
Key battery.................................. 6-34
Light Bulbs.................................. 6-40
Tires............................................. 6-38
Wheel........................................... 6-39
Wiper........................................... 6-29
Request switch inoperable warning beep
(With the advanced keyless
function)............................................ 7-44
Rocking the Vehicle.......................... 3-42
S
Safety Defects, Reporting................. 8-14
Saving Fuel and Protection of the
Environment...................................... 3-40
Scheduled Maintenance...................... 6-4
Seats.................................................... 2-5
Driver's seat................................... 2-5
Driving position memory............ 2-10
Front passenger's seat.................. 2-13
Front seat....................................... 2-5
Head restraint.............................. 2-17
Rear seat...................................... 2-14
Seat warmer................................. 2-19
Seat Belt System Automatic locking....................... 2-23
Emergency locking...................... 2-23
Extender....................................... 2-28
Pregnant women.......................... 2-22
Seat belt precautions................... 2-21
Seat belt warning beep...................... 7-42
Security System Immobilizer system..................... 3-36
Theft-deterrent system................. 3-38
Smart Brake Support (SBS)............ 4-123 Collision warning...................... 4-125
10-7
CX-3_8JL1-EA-20G_Edition1_old 2020-5-22 15:31:00