How to Replace the Battery in a Ford Focus Key Fob?
2 Answers
Ford Focus key fob battery replacement method is: 1. Press the button to remove the mechanical key; 2. Insert a screwdriver into the gap at the top of the key to pry open the shell; 3. Remove the old battery and install a new battery of the same model; 4. Reassemble the key. Taking the 2021 Ford Focus Manual Fengyue model as an example, it belongs to a compact car with body dimensions of: length 4647mm, width 1810mm, height 1468mm, and a wheelbase of 2705mm. The 2021 Ford Focus Manual Fengyue model is equipped with a 1.5L naturally aspirated engine, with a maximum power speed of 6500rpm and a maximum torque speed of 4500rpm.
I've just dealt with replacing the battery in my Focus key, and experience tells me details matter. You'll need a CR2032 coin cell battery, which is affordable and available at supermarkets or auto parts stores. On the back of the key, there's usually a small slot—use a tiny screwdriver or a hard plastic card to gently pry open the casing, being careful not to force it and damage the clips. Once opened, you'll see the old battery snugly in place; remove it gently, noting the polarity (usually indicated by a small arrow or marking). Insert the new battery with the positive side facing the correct direction—typically metal side down. Then snap the casing back together, pressing until you hear a click. Test the remote buttons and check if the indicator light comes on. Remember to work on a clean surface before DIYing, avoiding dusty areas. Battery life is generally about two years—replacing it early can prevent the embarrassment of a failed keyless start. The whole process takes just 3-5 minutes, saving you over $20 compared to a dealership visit.
