Mazda 3 Owner's Manual page 522

Maintenance and Care
Owner Maintenance
The following conditions indicate that the
battery power is low:
The KEY indicator light (green) fl ashes
in the instrument cluster for about 30
seconds after the engine is turned off.
The system does not operate and
the operation indicator light on the
transmitter does not fl ash when the
buttons are pressed.
The system's operational range is
reduced.
Replacing the battery at an Authorised
Mazda Repairer is recommended to
prevent damage to the key. If replacing the
battery by yourself, follow the instruction
below.
Replacing the key battery
1. Pull out the auxiliary key.
6–42
2. Insert a small, fl athead screwdriver
into the groove shown in the fi gure and
rotate the screwdriver to open the cover
slightly.
3. Insert the small, fl athead screwdriver
into the gap between the cover and
the transmitter, and then rotate the
screwdriver to detach the cover.