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Ford Focus Key Fob Battery Replacement Guide
How to change the battery in the combination car key & fob remote control of a 3rd generation 2011-2014 Ford Focus.

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2012 Focus Key Fob
Notch At Bottom Left
Pry Apart With Screwdriver
This automotive tutorial was specifically written to assist owners of the third generation (2011, 2012, 2013 & 2014) Ford Focus in replacing the battery inside the combination car key and keyless entry system remote control fob.

Owners of other Ford vehicles equipped with similar key fobs such as the Fusion, Fiesta, Taurus, C-Max, Mustang, Escape, Edge, Explorer and Flex may also find these DIY instructions to be helpful.

A replacement coin cell (A.K.A. "button" or "watch") battery is part number CR2032 from manufacturers such as Panasonic, GE, Sony, Maxell, Energizer and Philips.

The only tool needed to access the battery is a small flathead screwdriver or a plastic pry bar tool.

You could also use a coin, butter knife, nail file or a house key.

Back Cover Removed
Pull Out Old Battery
Old Battery Removed
The first two steps are to take off the key ring and locate the notch at the bottom left of the fob near the red "Panic" button.

Insert the blade of the flathead screwdriver in to the notch and gently pry apart the two halves of the fob.

Pull out the old battery with your finger tip or turn over the fob and gently tap it until the battery falls out.

You should notice some clear dielectric grease on the electrical contacts. Do not wipe it off.

Push In New CR 2032 3V
New Battery In Holder
Line Up Rear Cover of Fob
Push a new # CR2032 3 volt battery in to the socket with the "+" positive side facing up towards you.

Line up the rear cover of the fob over the front half.

Snap Together Two Halves
Key Fob Re-Assembled
Test New Key Fob Battery
Gently snap together the two pieces of the fob until they are flush.

To test the new key fob battery, stand next to your Focus and press the "Lock" or "Unlock" buttons. If the battery is working properly, you should see the parking lights flash.

For more, check out my other Ford Focus Repair & Maintenance Guides.

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