1. Gather the necessary materials. You will need a new CR2032 battery and a small flathead screwdriver.
2. Remove the key from your key fob. Press the small button on the back of the key fob and slide the key out of the fob.
3. Use the flathead screwdriver to pry open the back cover of the key fob. Be careful not to damage the key fob.
4. Remove the old battery from the key fob. Be careful not to drop the battery.
5. Insert the new battery into the key fob, positive side facing up.
6. Replace the back cover of the key fob.
7. Test the key fob to make sure it works properly.