How do you replace a battery in a 2009 Mazda 5 key fob?

To replace the battery in a 2009 Mazda 5 key fob, first, use a small flathead screwdriver to gently pry open the fob along the seam. Once opened, remove the old battery, typically a CR2025 or CR2032, and insert the new battery, ensuring the positive (+) side is facing up. Finally, snap the fob back together securely and test it to ensure it’s functioning properly.