How do you change the key-fob battery on a 2009 350 transit van?

To change the key fob battery on a 2009 Ford Transit van, first, use a small flathead screwdriver to gently pry open the key fob case. Once opened, remove the old battery, typically a CR2032, and replace it with a new one, ensuring the positive side is facing up. Snap the fob back together securely, and test the buttons to ensure it’s functioning properly.