1. Insert a small screwdriver into the slot and gently pry open the transmitter.

2. Press the portion of the battery indicated by A and remove the battery.

3. Install a new battery (CR2025) into the front portion of the holder with the positive pole (+) facing up. Press on the B portion of the battery to set the battery.
4. Align the front and back covers and snap the transmitter shut.
Battery specification Lithium CR2025 × 1
Note

Door lock timer unit id code change
Transmitter battery inspectionMazda 6 Service Manual: Installation of radio system
If a radio system is installed improperly or if a high-powered type is used,
the CIS and other systems may be affected. When the vehicle is to be equipped
with a radio, observe the following precautions:
Install the antenna at the farthest point from control modules.
Install the antenna fe ...
Mazda 6 Service Manual: Anti-theft system
Alarm Conditions
If the anti-theft system protection has been activated, any one of the
following conditions will trigger the system:
- Disconnected battery cable
- Discharged battery
- Disconnected audio unit connectors
If the system is triggered, the audio unit will then be ...