How to Replace the Key Battery for Mazda 3 Axela?

[MacAddyson]

Here are the detailed steps to replace the key battery for Mazda 3 Axela: 1. Locate the switch on the back of the key fob and pull out the metal mechanical key from the top, revealing a small groove. 2. Use a flat-head screwdriver or other tool to pry open the key fob cover along the groove. Once a gap appears, you can manually open it. 3. After opening the key fob cover, remove the old battery and replace it with a new one, paying attention to the correct polarity. 4. Reattach the key fob cover and reinsert the mechanical key.