How to Open and Replace the Battery in a Mazda 6 Key?

[CarterFitz]

Below are the detailed steps to replace the battery in a Mazda 6 key: 1. First, locate the switch on the back of the key fob and pull the top part outward. After removing the internal metal mechanical key, you will see a small groove. 2. Use a flathead screwdriver or another tool to pry open the key cover along the groove. Once a gap appears, you can manually open it. 3. After opening the key cover, remove the old battery and replace it with a new one, paying attention to the battery's polarity. 4. Reattach the key cover and reinsert the mechanical key.