Mazda mx-5 2017 Owner's Manual page 401

The following conditions indicate that the
battery power is low:
The KEY indicator light (green) flashes

in the instrument cluster for about 30
seconds after the engine is turned off
(for vehicles with a type A instrument
cluster (page 4-26), messages are
displayed in the instrument cluster).
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. Press the knob and pull out the
auxiliary key.
Knob
Owner Maintenance
2. Twist a tape-wrapped flathead
screwdriver in the direction of the
arrow and open the cover slightly.
Cover
3. Insert the tape-wrapped flathead
screwdriver into the gap and slide it in
the direction of the arrow.
Cover
4. Twist the flathead screwdriver in the
direction of the arrow and remove the
cover.
Cover
Maintenance and Care
Gap
6–39