2021 MAZDA MODEL 6 change key battery

Keyless Entry System
This system uses the key buttons to
remotely lock and unlock the doors, and
opens the trunk lid.
The system can start the engine without
having to take the key out of your purse or
pocket.
It can also help you s ignal for attention or
help.
Operating the theft-deterrent system is
also possible on theft-deterrent
system-equipped vehicles.

System malfunctions or warnings are
indicated by the fo llowing warning lights
or beeps.
For vehicles with t he type A/type B
instrument cluster, check the displayed
message for more i nformation and, if
necessary, have the vehicle inspected at an
Authorized Mazda Dealer, according to
the indication.
KEY Warning Light (Red)
Refer to Contact Authorized Mazda
Dealer and Have Vehicle Inspected on
page 7-28.
Refer to Taking Action on page 7-35.
Ignition Not Switched Off (STOP)
Warning Beep
Refer to Ignition Not Switched Off
(STOP) Warning Beep on page 7-46.
Key Removed from Vehicle Warning
Beep
Refer to Key Removed from Vehicle
Warning Beep on page 7-46.
If you have a problem with the key,
consult an Authorized Mazda Dealer.

If your key is lost or stolen, consult an
Authorized Mazda Dealer as soon as
possible for a replacement and to make the
lost or stolen key inoperative.
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 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
6-41).
Before Driving
Keys
3-4
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Battery life is about 1 year. Replace the
battery with a new one if the KEY
indicator light (green) flashes in the
instrument cluster (for vehicles with a
type A/type B instrument cluster (page
4-14, 4-33), messages are displayed
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 the
Authorized Mazda Dealer when
additional keys are required.
▼Transmitter
Operation
buttons
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
3-42.
(With the advanced
keyless function)
A beep sound can be heard for
confirmation when the doors 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 the Settings section in the
Mazda Connect Owner's Manual.
The operation indicator light flashes when
the buttons are pressed.
Before Driving
Keys
3-5
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Index
Transmitter.....................................3-5
Key Left-in-trunk Warning Beep (With
the advanced keyless function)......... 7-47
Key Left-in-vehicle Warning Beep (With
the advanced keyless function)......... 7-47
Key Removed from Vehicle Warning
Beep...................................................7-46
Key Suspend Function........................ 3-9
L
Label Information............................... 9-2
Lane Departure Warning sound........ 7-48
Lane-Change Signals........................ 4-84
Lane-keep Assist System (LAS) & Lane
Departure Warning System
(LDWS)........................................... 4-164
Leaving Home Light......................... 4-83
Lighting Control................................4-78
Lights-on Reminder.......................... 7-45
Light Bulbs Replacement................................ 6-48
Specifications.................................9-7
Lubricant Quality ................................ 9-5
Luggage Compartment......................5-38
M
Maintenance Information.................................... 6-2
Scheduled.......................................6-4
Map Lights........................................ 5-28
Mazda Connect................................... 5-9 Appendix..................................... 5-20
Mazda Connect Basic
Operations....................................5-12
Mazda Radar Cruise Control with Stop &
Go function (MRCC with Stop & Go
function).......................................... 4-150 Close proximity warning........... 4-154
Cruise control function.............. 4-161
Display indication......................4-153
Setting the system..................... 4-155
Stop hold control....................... 4-160
Mazda Radar Cruise Control with Stop &
Go function (MRCC with Stop & Go
function) System Warnings............... 7-49
Message Indicated on Display.......... 7-43
Meters................................................ 4-13
Mirrors Outside mirrors..... ....................... 3-29
Rearview mirror.......................... 3-31
Mirror Defogger......... ....................... 4-90
Moonroof...........................................3-37
Multi-information Display (Type
A).......................................................4-15
Multi-information Display (Type
B)....................................................... 4-34
Multi-information Display (Type
C)....................................................... 4-52
O
Outside Mirrors......... ........................ 3-29
Overhead Console............................. 5-36
Overhead Lights................................ 5-28
Overheating....................................... 7-20
Overloading....................................... 3-49
Owner Maintenance Closing the hood...... ................... 6-19
Engine compartment overview.... 6-20
Key battery replacemen t..............6-41
Opening the hood........................ 6-18
Owner maintenance
precautions................................... 6-16
P
Parking Brake..................................4-101
Parking Sensor System................... 4-248 Parking sensor system
operation.................................... 4-252
Sensor detection range.............. 4-250
Power Steering................................ 4-118
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