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.
Locking, Unlocking the Doors and the Liftgate

NOTE
The system may not operate if you are too close to the windows, door handles, or liftgate.
Opening the Liftgate

Advanced Keyless Entry System
Doors and LocksWinter Driving
Carry emergency gear, including tire chains, window scraper, flares, a small
shovel, jumper cables, and a small bag of sand or salt.
Ask an Authorized Mazda Dealer to perform the following precautions: l Have the
proper ratio of antifreeze in the radiator.
• Inspect the battery and its cable ...
Camshaft Position (CMP) Sensor Removal/Installation
CAUTION:
When replacing the CMP sensor, make sure there is no foreign material on
it such as metal shavings. If it is installed with foreign material, the sensor
output signal will malfunction resulting from fluctuation in magnetic flux and
cause a deterioration in engine control.
...
Curtain Air Bag Module [Standard Deployment Control System]
Purpose
When a curtain air bag module receives an impact from a lateral collision,
the operation (deployment) of the air bag mediates the impact to the head of
the driver and front passenger.
Function
When a curtain air bag module receives an impact from a lateral collision ...