2021 Mazda3 Keys and Doors User Manual

Introduction

A beautiful and well-equipped compact car with cutting-edge technology and safety features is the 2021 Mazda3. This model’s doors and keys were created by Mazda with ease and security in mind. The 2021 Mazda3 has a keyless entry feature that makes it simple for the driver to unlock the doors without the need for a standard key. The key fob has buttons that can remotely lock and open the doors without the use of a key. For emergency situations, this system also features a panic button.

• Keyless Ignition: The Mazda3 is simple to start thanks to the keyless ignition technology. To start the engine, all you need to do is place the key fob inside the car, apply the brakes, and press the engine start/stop button. The driving experience is made more convenient and stylish with the help of this technology.
• enhanced Keyless Entry: The 2021 Mazda3’s higher trim levels come with an enhanced keyless entry technology. As the driver approaches the vehicle, this technology recognizes the key fob, making access simple. While holding the key fob, the driver can open the doors by just pressing the door handle.
• Security Features: To prevent unauthorized access to the 2021 Mazda3, Mazda has put in place a number of security measures. The rolling code technology used in the keyless entry system makes it harder for potential criminals to intercept the signal and obtain admission. To increase the car’s overall security, the doors have been reinforced with high-strength materials.
• Child Safety Locks: The 2021 Mazda3 comes with child safety locks for the rear doors, giving parents of young children peace of mind. These locks, when activated, stop kids from unintentionally opening the back doors from the inside.

Keys and Doors

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 (transmitter) is carried with communication devices such as cellular phones.
• The key (transmitter) contacts or is covered by a metal object.
• The key (transmitter) 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 (transmitter) near electronic devices such as televisions or personal computers.
• To avoid damage to the key (transmitter),
  DO NOT:
• Drop the key (transmitter).
• Get the key (transmitter) wet.
• Disassemble the key (transmitter).
• Expose the key (transmitter) to high temperatures on places such as the dashboard, under direct sunlight.
• Expose the key (transmitter) to any kind of magnetic field.
• Place heavy objects on the key (transmitter). Put the key (transmitter) in an ultrasonic cleaner. Put any magnetized objects close to the key (transmitter).

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

TransmitterAuxiliary key
There is a removable auxiliary key inside the transmitter.

Removing the auxiliary key

1. Remove the lower cover while sliding the knob in the direction of the arrow.
2. Remove the auxiliary key.

Installing the auxiliary key

1. Install the auxiliary key as in the illustration.
2. Insert the tabs of the lower cover into the slots of the transmitter and install the lower cover.

Key code number plate
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 an Authorized Mazda Dealer and have your code number ready.

1. Key code number plate

Keyless Entry System

This system uses the key buttons to remotely lock and unlock the doors, liftgate, and fuel-filler lid, 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 signal 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 following warning lights or beeps. Check the displayed message for more information and, if necessary, have the vehicle inspected at an Authorized Mazda Dealer, according to the indication.

1. KEY Warning Indication/Warning Light (Red)
2. Ignition Not Switched Off (STOP) Warning Beep
3. Key Removed from Vehicle Warning Beep

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

1. The keyless entry system operation may vary due to local conditions.
2. The keyless entry system is fully operational when the ignition is switched off. The system does not operate if the ignition is switched to any position other than off.
3. 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 6-30).
4. Battery life is about 1 year. Replace the battery with a new one if the messages are displayed in the instrument cluster. Replacing the battery about once a year is recommended because the KEY warning indication may not display depending on the rate of battery depletion.
5. 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.

Transmitter

1. Operation indicator light
2. Lock button
3. Unlock button
4. Trunk button (4–door)
5. Panic button

NOTE

1. The headlights turn on/off by operating the transmitter.
2. (With theft-deterrent system) The hazard warning lights flash when the theft-deterrent system is armed or turned off.
3. (With the advanced keyless function) A beep sound can be heard for confirmation when the doors, liftgate, and fuel-filler 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 the Settings section in the Mazda Connect Owner’s Manual.

The operation indicator light flashes when the buttons are pressed.

Lock button
To lock the doors, liftgate, and fuel-filler lid, press the lock button and the hazard warning lights will flash once. (With the advanced keyless function) A beep sound will be heard once. To confirm that all the doors, liftgate, and fuel-filler lid have been locked, press the lock button again within 5 seconds. If they are closed and locked, the horn will sound.NOTE

1. The doors can be locked when the lock button on the transmitter is pressed while any door is open.
2. To prevent the transmitter from being left in the vehicle, make sure that the driver carries the transmitter when locking the doors with any door open.
3. When any door or the liftgate/trunk lid is open and the lock button is pressed, the closed doors can be locked. After that, any other open door or the liftgate/trunk lid can be locked by closing them.
4. Confirm that all the doors, liftgate, and fuel-filler lid are locked visually or audibly by use of the double click.
5. Make sure all the doors, liftgate, and fuel-filler lid are locked after pressing the button.
6. (With theft-deterrent system) If the lock button is pressed with all the doors and liftgate closed, the hazard warning lights will flash and the theft-deterrent system is armed.

Unlock button To unlock the driver’s door and the fuel-filler lid, press the unlock button and the hazard warning lights will flash twice. (With the advanced keyless function) A beep sound will be heard twice. To unlock the other doors and liftgate, press the unlock button again within 5 seconds and two more beep sounds will be heard.NOTE

1. The system can be set to unlock all the doors, liftgate, and fuel-filler lid when pressing the unlock button once. Refer to the Settings section in the Mazda Connect Owner’s Manual.
2. (Auto re-lock function)
   After unlocking with the key, all the doors, liftgate, and fuel-filler lid will automatically lock if any of the following operations are not performed within about 60 seconds. If your vehicle has a theft-deterrent system, the hazard warning lights will flash for confirmation. The time required for the doors to lock automatically can be changed. Refer to the Settings section in the Mazda Connect Owner’s Manual.
   1. A door or the liftgate/trunk lid is opened.
   2. The ignition is switched to any position other than off.
3. (With theft-deterrent system) When the doors are unlocked by pressing the unlock button on the key while the theft-deterrent system is turned off, the hazard warning lights will flash twice to indicate that the system is turned off.

Trunk button (4–door)
To open the trunk lid, press and hold the trunk button until the trunk lid opens.Panic button
If you witness from a distance someone attempting to break into or damage your vehicle, press and hold the panic button to activate the vehicle’s alarm. Call emergency services if necessary.NOTE
The panic button will work whether any door or the liftgate/trunk lid is open or closed.

(Turning on the alarm)
Pressing the panic button for 1 second or more will trigger the alarm for about 2 minutes and 30 seconds, and the following will occur:

1. The horn sounds intermittently.
2. The hazard warning lights flash.

(Turning off the alarm)
The alarm stops by pressing any button on the key.

Power saving function
By turning on the transmitter power saving function, the advanced keyless entry*1 system functions turn off and the battery power consumption of the transmitter is restricted. The remote control function is operational by operating the transmitter switch even while the power saving function is turned on. However, the operation indicator light of the transmitter does not turn on/flash.

Turning on the power-saving function
After you have turned on the power saving function according to the following procedure, the hazard warning lights and sound operate*1 one time.

1. Press the lock button on the transmitter 4 times within 3 seconds to turn on the operation indicator light.
2. Press the lock button continuously for 1.5 seconds or longer while the operation indicator light turns on (for 5 seconds).
3. Press any of the buttons on the transmitter to make sure that the operation indicator light does not turn on/flash.

Turning off the power-saving function
After you have turned off the power saving function according to the following procedure, the hazard warning lights and sound operate*1 one time.

1. Press any of the buttons on the transmitter to make sure that the operation indicator light does not turn on/flash.
2. Press the lock button on the transmitter 4 times within 3 seconds to turn on the operation indicator light.
3. Press the lock button continuously for 1.5 seconds or longer while the operation indicator light turns on (for 5 seconds).

With the advanced keyless function

Operational Range
The system operates only when the driver is in the vehicle or within operational range while the key is being carried.

Starting the engine

NOTE

1. Starting the engine may be possible even if the key is outside of the vehicle and extremely close to a door and window, however, always start the engine from the driver’s seat. If the vehicle is started and the key is not in the vehicle, the vehicle will not restart after it is shut off and the ignition is switched off.
2. The luggage compartment/trunk is out of the assured operational range, however, if the key (transmitter) is operable the engine will start.

With the advanced keyless function

1. Interior antenna
2. Operational range

Without the advanced keyless function

1. Interior antenna
2. Operational range

NOTE The engine may not start if the key is placed in the following areas:

1. Around the dashboard
2. In the storage compartments such as the glove compartment or the center console
3. On the rear parcel shelf
   (4–door)

Key Suspend Function
If a key is left in the vehicle, the functions of the key left in the vehicle are temporarily suspended to prevent theft of the vehicle. To restore the functions, press the unlock button on the functions-suspended key in the vehicle.

Advanced Keyless Entry System

WARNING
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, 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.

1. Touch Sensor Inoperable Warning Beep Refer to Touch Sensor Inoperable Warning Beep (With the advanced keyless function).
2. Liftgate Door-lock Switch Inoperable Warning Beep Refer to Liftgate Door-lock Switch Inoperable Warning Beep (With the advanced keyless function)
3. Key Left-in-luggage Compartment/Trunk Warning Beep Refer to Key Left-in-luggage Compartment/Trunk Warning Beep (With the advanced keyless function).
4. Key Left-in-vehicle Warning Beep Refer to Key Left-in-vehicle Warning Beep (With the advanced keyless function).

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.

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,.

Locking/Unlocking Using Touch Sensor

1. Exterior antenna
2. 80 cm (31 in)
3. Operational range

NOTE

1. The system may not operate if you are too close to the windows or door handles.
2. 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.
3. Around the dashboard
4. In the storage compartments such as the glove compartment or the center console
5. On the rear parcel shelf (4–door)
6. 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

Door Locks

WARNING Always take all children and pets with you or leave a responsible person with them:
Leaving a child or a pet unattended in a parked vehicle is dangerous. In hot weather, temperatures inside a vehicle can become high enough to cause brain damage or even death.

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.

Keep all doors locked when driving:
Unlocked doors in a moving vehicle are dangerous. Passengers can fall out if a door is accidentally opened and can more easily be thrown out in an accident.

Always close all the windows and moonroof, lock the doors, fuel-filler lid, and liftgate and take the key with you when leaving your vehicle unattended:
Leaving your vehicle unlocked is dangerous as children could lock themselves in a hot vehicle, which could result in death. Also, a vehicle left unlocked becomes an easy target for thieves and intruders.

After closing the doors and the liftgate/trunk lid, always verify that they are securely closed:
Doors and the liftgate/trunk lid not securely closed are dangerous, if the vehicle is driven with a door and the liftgate/trunk lid not securely closed, the door and the liftgate/trunk lid could open unexpectedly resulting in an accident.

Always confirm the safety around the vehicle before opening a door and the liftgate/trunk lid:
Suddenly opening a door and the liftgate/trunk lid is dangerous. A passing vehicle or a pedestrian could be hit and cause an accident. CAUTION Always confirm the conditions around the vehicle before opening/closing the doors and the liftgate/trunk lid and use caution during strong winds or when parked on an incline. Not being aware of the conditions around the vehicle is dangerous because fingers could get caught in the door and the liftgate/trunk lid or a passing pedestrian could be hit, resulting in an unexpected accident or injury.

NOTE

1. Always stop the engine and lock the doors. In addition, to prevent theft of valuables, do not leave them inside the cabin.
2. 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.
   1. Around the dashboard
   2. In the storage compartments such as the glove compartment or the center console
   3. On the rear parcel shelf (4–door)
   4. Next to a communication device such as a mobile phone
3. 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, fuel-filler lid, and liftgate will automatically unlock if they are locked using the power door locks with any door or the liftgate open. The vehicle lock-out prevention feature does not operate while the ignition is switched off. When all doors, fuel-filler lid, and liftgate are locked using the power door lock with any door or the liftgate/trunk lid open, the closed doors, fuel-filler lid, and liftgate 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, fuel-filler lid, and liftgate 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, fuel-filler lid, and liftgate 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, fuel-filler lid, and liftgate are automatically unlocked after about 6 seconds have elapsed from the time of the accident. The doors, fuel-filler lid, and liftgate 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, fuel-filler lid, and liftgate may not unlock depending on your vehicle type.

Unlocking with Auxiliary Key
Only the driver’s door can be unlocked using the auxiliary key. 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.

LockingUnlocking

1. The system may not operate normally under the following conditions.
   1. 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.
   2. You touch the sensing area of the touch sensor while wearing gloves.
   3. Foreign matter such as snow or dirt is stuck on the sensing area of the touch sensor.
   4. You pull the door handle just after touching the sensing area of the touch sensor.
2. 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.
3. 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.

1. The ignition is switched OFF.
2. All the doors are closed.
3. You are carrying the transmitter.

The following locations are locked by touching the sensing area of the door lock touch sensor.

1. All doors
2. Fuel-filler lid
3. 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.

1. The ignition is switched OFF.
2. The driver’s door is locked.
3. Three seconds or longer have passed since the doors were locked.
4. 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.

1. Driver’s door
2. 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.

1. All doors
2. Fuel-filler lid
3. Liftgate

When unlocking, the hazard warning lights and sound operate two times.

NOTE

1. Confirm 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.
2. 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 off. The volume of the beep sound can also be changed. Refer to the Settings section in the Mazda Connect Owner’s Manual.
3. (With theft-deterrent system) The hazard warning lights flash when the theft-deterrent system is armed or turned off.
4. 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.

(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.

1. 1. Opening a door or the liftgate/trunk lid.
   2. Switching the ignition to any position other than off.

If your vehicle has a theft-deterrent system, the hazard warning lights will flash for confirmation. 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 Transmitter
The following locations can be locked/unlocked by operating the keyless entry system transmitter.

1. All doors
2. Fuel-filler lid
3. 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.

1. All doors
2. Fuel-filler lid
3. Liftgate

Driver’s door

1. Unlock
2. Lock

Front passenger’s door

1. Unlock
2. Lock

NOTE

1. To prevent the transmitter from being left in the vehicle, make sure that you carry the transmitter before locking.
2. After locking by pressing the door-lock switch and when the liftgate/trunk lid is closed last with the transmitter left in the vehicle, only the liftgate/trunk lid is unlocked.

Locking from the outside using the door-lock switch
Doors can be locked from the outside of the vehicle without using the transmitter. 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.

1. The ignition is switched OFF.
2. Any door is open.

NOTE

1. To prevent the transmitter from being left in the vehicle, make sure that the driver carries the transmitter when locking the doors with any door open.
2. After locking by pressing the door-lock switch and when all the doors are closed with the transmitter left in the vehicle, all the doors, liftgate, and fuel-filler lid are unlocked.

Door-lock switch on liftgate (With the advanced keyless function)
All doors, fuel-filler lid, and the liftgate can be locked by pressing the door-lock switch.When locking using the door-lock switch, press the door-lock switch with all of the following conditions met and then close the liftgate.

1. You are carrying the transmitter.
2. The ignition is switched OFF.
3. All the doors are closed.

(With theft-deterrent system)
When locking, a beep sound operates 1 time. When the liftgate closes, the hazard warning lights operate 1 time.
(Without theft-deterrent system)
When locking, the hazard warning lights and a beep sound operate 1 time.

NOTE

1. To prevent the transmitter from being left in the vehicle, make sure that you carry the transmitter before locking.
2. After locking by pressing the door-lock switch and when the liftgate is closed with the transmitter left in the vehicle, the liftgate is unlocked.

Auto Lock/Unlock Function

WARNING

Do not pull the inner handle on a front door:
Pulling the inner handle on a front door while the vehicle is moving is dangerous. Passengers can fall out of the vehicle if the door opens accidentally, which could result in death or serious injury.

1. When the vehicle speed exceeds 20 km/h (12 mph), all the doors, fuel-filler lid, and liftgate lock automatically.
2. When the ignition is switched off, all the doors, fuel-filler lid, and liftgate unlock automatically.

The auto lock/unlock function settings can be changed. Refer to the Settings section in the Mazda Connect Owner’s Manual.

Locking, Unlocking with Door-Lock Knob Operation from inside
To lock any door from the inside, press the door-lock knob. To unlock it, pull it outward. This does not operate the other door locks.

1. Unlocked: Red indicator
2. Lock
3. Unlock

Operation from outside
To lock any door using its door-lock knob from the outside, press the door-lock knob to the lock position and close the door (holding the door handle in the open position is not required). This does not operate the other door locks.NOTE
When locking the door this way:

1. Be careful not to leave the key inside the vehicle. Make sure that you are carrying the key before closing the doors.
2. The doors cannot be locked using the driver’s door lock knob if any door or liftgate is open when the ignition is switched to ACC or ON.
3. All the doors, fuel-filler lid , and liftgate are unlocked when the lock knob on all the doors is pressed down to the lock side and all the doors are closed with the transmitter left in the vehicle.

Rear Door Child Safety Locks
Rear doors that have been locked using the child safety lock switched to the lock side cannot be opened from inside the vehicle. For child safety, switch the child safety lock on both rear doors to the lock side. When opening a rear door with the child safety lock switched to the lock side, pull the outer door handle with the lock knob inside the vehicle switched to the unlock side.

1. Auxiliary key
2. Lock
3. Unlock

Liftgate/Trunk Lid

WARNING Never allow a person to ride in the luggage compartment/trunk:
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.

Do not drive with the liftgate/trunk lid open:
Exhaust gas in the cabin of a vehicle is dangerous. An open liftgate/trunk lid in a moving vehicle will cause exhaust gas to be drawn into the cabin. This gas contains CO (carbon monoxide), which is colorless, odorless, and highly poisonous, and it can cause loss of consciousness and death. Moreover, an open liftgate/trunk lid could cause occupants to fall out in an accident.

Do not stack or leave loaded luggage unsecured in the luggage compartment:
Otherwise, the luggage may move or collapse, resulting in injury or an accident. In addition, do not load luggage higher than the seatbacks. It may affect the side or rear field of view. Additionally, if the air bags deploy, the cargo may scatter which could result in serious injury or death.

CAUTION

1. Before opening the liftgate/trunk lid, remove any snow and ice accumulation on it. Otherwise, the liftgate/trunk lid could close under the weight of the snow and ice resulting in injury.
2. Be careful when opening/closing the liftgate/trunk lid during strong winds. If a strong gust blows against the liftgate/trunk lid, it could close suddenly resulting in injury.
3. Fully open the liftgate/trunk lid and make sure that it stays open. If the liftgate/trunk lid is only opened partially, it could slam shut by vibration or wind gusts resulting in injury.
4. When loading or unloading luggage in the luggage compartment/trunk, turn off the engine. Otherwise, you could get burned by the heat of the exhaust gas.
5. Be careful not to apply excessive force to the damper stay on the liftgate such as by putting your hand on the stay. Otherwise, the damper stay may bend and affect the liftgate operation.
6. Do not modify or replace the liftgate damper stay. Consult an Authorized Mazda Dealer if a liftgate damper stay is deformed or damaged for reasons such as a collision or if there is some other problem.

Opening and Closing the Liftgate/Trunk Lid

Opening the liftgate (5–door) Using the electric liftgate opener
Unlock the doors and liftgate, then press the electric liftgate opener on the liftgate and raise the liftgate when the latch releases.NOTE (With the advanced keyless function)

1. A locked liftgate can also be opened while the key is being carried.
2. 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.
3. 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 completely closed, then press the electric liftgate opener to fully open the liftgate.
4. 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 opener again.
   To close
   To close the liftgate from its slightly raised position, open it first by pressing the electric liftgate opener, then close it after waiting at least 1 second.
5. 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.

Opening the trunk lid (4–door) Using the trunk lid release button
Push the trunk lid release button.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 released.NOTE

1. 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.
2. 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.
3. 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.

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)(4–door)WARNING Do not drive the vehicle with the liftgate-ajar warning indication displayed :
Otherwise, the liftgate/trunk lid may open unexpectedly and result in an accident.

NOTE
Confirm that the liftgate/trunk lid is securely closed. Move the liftgate/trunk lid without pressing the electric liftgate/trunk lid opener to verify that the liftgate/trunk lid has not been left ajar. Luggage Compartment
Luggage compartment cover
(5-door)

WARNING
Do not place anything on top of the cover:
Placing luggage or other cargo on top of the luggage compartment cover is dangerous. During sudden braking or a collision, the cargo could become a projectile that could hit and injure someone.

Make sure luggage and cargo are secured before driving:
Not securing cargo while driving is dangerous as it could move or be crushed during sudden braking or a collision and cause injury.

CAUTION
Make sure the luggage compartment cover is firmly secured. If it is not firmly secured, it could unexpectedly disengage resulting in injury. The luggage compartment can be accessed by opening the liftgate when the straps are attached to the sides of the liftgate.Removing the luggage compartment cover
This cover can be removed for more room.

1. Remove the straps from the hooks.
2. Press the luggage compartment cover upward from near the pins and remove the luggage compartment cover from the pins.
3. Lift the front end of the luggage compartment cover and remove it.

Inside Trunk Release Lever (4-door)

Inside Trunk Release Lever
Your vehicle is equipped with an inside trunk release lever that provides a means of escape for children and adults in the event they become locked inside the trunk. No matter how careful adults might be with keys and locking their cars, parents should be aware that children may be tempted to play around vehicles and use the trunk as a hiding place. Adults are advised to familiarize themselves with the operation and location of the inside trunk release lever so that all children can be told about it in an appropriate way, keeping in mind that most vehicles do not have such levers. WARNING

Close the trunk lid, be sure the seat backs are latched and do not allow children to play inside the vehicle:
Leaving the trunk lid open or leaving children in the vehicle with the keys is dangerous. Children could open the trunk lid and climb inside resulting in possible injury or death from heat exposure.

Always keep the car from being a tempting place to play by latching the rear seats, doors and the trunk, and keeping the keys where children can not play with them: Leaving children or animals unattended in a parked vehicle is dangerous. Babies left sleeping and children who lock themselves in cars or trunks can die very quickly from heat prostration. Do not leave your children or pets alone in a car at any time. Do not leave the car, the rear folding seats or the trunk unlocked.

Opening the Trunk Lid from the Inside
Slide the inside trunk release lever in the direction of the arrow. The lever is made of material that will glow for hours in the darkness of the trunk following a brief exposure to ambient light. The inside trunk release lever is located on the inside of the trunk lid.

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.

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 affect the emission control system performance and could also cause engine knocking and serious engine damage.

CAUTION

1. 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.
2. 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 contains any methanol. Stop using gasohol of any kind if your vehicle engine is performing poorly.
3. 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.

1. Gasohol containing more than 10 % ethanol.
2. Gasoline or gasohol containing methanol.
3. Leaded fuel or leaded gasohol.

Emission Control System
This vehicle is equipped with an emission control system (the catalytic converter is part of this system) that enables the vehicle to comply with existing exhaust emissions requirements.

WARNING

Never park over or near anything flammable:
Parking over or near anything flammable, such as dry grass, is dangerous. Even with the engine turned off, the exhaust system remains very hot after normal use and could ignite anything flammable. A resulting fire could cause serious injury or death.

CAUTION
Ignoring the following precautions could cause lead to accumulate on the catalyst inside the converter or cause the converter to get very hot. Either condition will damage the converter and cause poor performance.

1. USE ONLY UNLEADED FUEL.
2. Do not drive your Mazda with any sign of engine malfunction.
3. Do not coast with the ignition switched off.
4. Do not descend steep grades in gear with the ignition switched off.
5. Do not operate the engine at high idle for more than 2 minutes.
6. Do not tamper with the emission control system. All inspections and adjustments must be made by a qualified technician.
7. Do not push-start or pull-start this vehicle.

NOTE

1. Under U.S. federal law, any modification to the original-equipment emission control system before the first sale and registration of a vehicle is subject to penalties. In some states, such modification made on a used vehicle is also subject to penalties.
2. While the engine is off, the sound of a valve opening and closing can be heard at the rear of the vehicle, however, this does not indicate an abnormality. The vehicle has a self-checking device and it operates while the engine is off.

Engine Exhaust (Carbon monoxide)

WARNING
Do not drive your vehicle if you smell exhaust gas inside the vehicle: Engine exhaust gas is dangerous. This gas contains carbon monoxide (CO), which is colorless, odorless, and poisonous. When inhaled, it can cause loss of consciousness and death. If you smell exhaust gas inside the vehicle, keep all windows fully open and contact an Authorized Mazda Dealer immediately.

Do not run the engine when inside an enclosed area:
Running the engine inside an enclosed area, such as a garage, is dangerous. Exhaust gas, which contains poisonous carbon monoxide, could easily enter the cabin. Loss of consciousness or even death could occur.

Open the windows or adjust the heating or cooling system to draw fresh air when idling the engine:
Exhaust gas is dangerous. When the vehicle is stopped with the windows closed and the engine running for a long time even in an open area, exhaust gas, which contains poisonous carbon monoxide, could enter the cabin. Loss of consciousness or even death could occur.

Clear snow from underneath and around your vehicle, particularly the tail pipe, before starting the engine:
Running the engine when a vehicle is stopped in deep snow is dangerous. The exhaust pipe could be blocked by the snow, allowing exhaust gas to enter the cabin. Because exhaust gas contains poisonous carbon monoxide, it could cause loss of consciousness or even death to occupants in the cabin.

Fuel-Filler Lid and Cap

WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it:

Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness if ingested. Fuel spray is released when there is pressure in the fuel tank and the fuel-filler cap is removed too quickly.

Before refueling, stop the engine, and always keep sparks and flames away from the filler neck:
Fuel vapor is dangerous. It could be ignited by sparks or flames causing serious burns and injuries. Additionally, use of the incorrect fuel-filler cap or not using a fuel-filler cap may result in a fuel leak, which could result in serious burns or death in an accident.

Do not continue refueling after the fuel pump nozzle shuts off automatically:
Continuing to add fuel after the fuel pump nozzle has shut off automatically is dangerous because overfilling the fuel tank may cause fuel overflow or leakage. Fuel overflow and leakage could damage the vehicle and if the fuel ignites it could cause a fire and explosion resulting in serious injury or death.

CAUTION

1. Always use only a genuine Mazda fuel-filler cap or an approved equivalent, available at an Authorized Mazda Dealer. The wrong cap can result in a serious malfunction of the fuel and emission control systems. (U.S.A. and Canada) It may also cause the check engine light in the instrument cluster to illuminate.
2. When using an automatic car wash or a high-water pressure car washer, lock the vehicle. Otherwise, the fuel-filler lid may open unexpectedly and could be damaged.

Refueling Before refueling, close all the doors, windows, and liftgate/trunk lid, and switch the ignition OFF.

1. 1. Using the following, unlock the driver’s door.
   1. Transmitter
   2. Touch sensor
   3. Door-lock switch
   4. Auto lock/unlock function
      NOTE
   5. When unlocking the driver’s door, the fuel lid is also unlocked at the same time.
   6. When locking the driver’s door, the fuel lid is locked after 90 seconds.
   7. The time until the fuel lid is locked after locking the driver’s door can be changed. Refer to the Settings section in the Mazda Connect Owner’s Manual.
   8. However, when the driver’s door is locked using the following functions, the fuel lid is also locked at the same time.
2. Press the location shown in the illustration and open the fuel lid.
3. To remove the fuel-filler cap, turn it counterclockwise.
4. Attach the removed cap to the inner side of the fuel-filler lid
   . 4–door5–door
5. Insert the refueling nozzle all the way and begin refueling. Pull out the refueling nozzle after the refueling stops automatically.
6. To close the fuel-filler cap, turn it clockwise until a click is heard.
7. To close, press the fuel-filler lid until a click sound is heard.
   4–door5–door
8. Make sure to lock all the doors when leaving the vehicle.

NOTE
Lock the doors after closing the fuel-filler lid. If the fuel-filler lid is closed after locking the doors, the fuel-filler lid cannot be locked.

CAUTION (U.S.A. and Canada)
If the check fuel cap warning light illuminates, the fuel-filler cap may not be properly installed. If the warning light illuminates, park your vehicle safely off the right-of-way, remove the fuel-filler cap and reinstall it correctly. After the cap has been correctly installed, the fuel cap warning light may continue to illuminate until a number of driving cycles have been completed. A drive cycle consists of starting the engine (after four or more hours with the engine off) and driving the vehicle on city and highway roads. Continuing to drive with the check fuel cap warning light illuminated could cause the check engine light to illuminate as well.  

FAQs

Useful Links

View Full User: 2021 Mazda3 User Manual | Auto User Guide
Download Link: Owner’s – Manuals, Guides, Maintenance Schedules | Mazda USA