How to Replace the Key Battery

Replace with a new battery before the key becomes unusable.

The following conditions indicate that the battery power is low:

  • The KEY indicator light (green) flashes 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.

Incorrect battery replacement operation may damage the key. Replacing the battery at an Authorized Mazda Dealer is recommended.

If replacing the battery by yourself, heed the following instructions.

  1. Remove the lower cover while pressing the knob in the direction of the arrow.

  2. Press in the tab to unlock the upper cover.

  3. Insert a tape-wrapped flathead screwdriver into the gap and slide it.

  4. Twist the flathead screwdriver and remove the upper cover.

  5. Remove the cap using the tape-wrapped flathead screwdriver.

  6. Remove the battery using the tape-wrapped flathead screwdriver.

  7. Insert a new battery into the key so that the positive pole is facing up.

  8. Install the cap.

  9. Install the upper cover.

  10. Attach the lower cover so that its tabs are inserted into the slots of the key.

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