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Ford Fusion Smart Key Fob Battery Replacement Guide
How to change the batteries in the intelligent access key fob remote control for a 2nd generation 2013-2016 Ford Fusion.

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2014 Fusion Smart Key Fob
Back Side of Fob
Release Switch
This automotive maintenance tutorial was specifically written to assist owners of the second generation (2013, 2014, 2015, 2016 & possibly the revised 2017 model year) Ford Fusion sedan in changing the two batteries in the smart or "intelligent access" key fob remote control for the keyless entry and push button engine start systems.

Owners of other Ford or Lincoln vehicles such as the Focus, Fiesta, C-Max, Mustang, Escape, Transit Connect, Edge, Flex, Explorer, Expedition, Taurus, F-150, EcoSport, MKC, MKZ, MKS, MKX, MKT and the Navigator may also find these DIY instructions to be helpful.

A replacement coin cell (A.K.A. "button" or "watch") battery is part number CR2025.

They are available from various manufacturers such as Panasonic, Sony, Duracell, Engergizer and Maxell.

You will need two new CR2025 batteries.)

The tools that you may need to access and replace the batteries include a coin and/or a flathead screwdriver.

Push In Release Button
Lift Open Rear Cover
Back Cover Removed
The first two steps are to turn over the key fob and locate the black plastic button or "switch".

Slide in the switch to release the back cover.

Pull off the back cover and set it aside in a safe place.

Notch On Top Edge
Closer View of Notch
Pry Apart With Quarter
Locate the notch on the top edge of the key fob near the "Unlock" and "Lock" buttons.

Insert a coin, butter knife or a large flathead screwdriver in to the notch.

Gently pry apart the two halves of the fob.

Two Halves Separated
Pry Out First Battery
Change Both Batteries
Once the two halves have been separated, you'll be able to access the two coin cell batteries.

Gently pry out the top battery with your finger nail or a small flathead screwdriver.

Under the top battery, you'll see a piece of round white plastic that separates the two batteries. It lists the part number as CR2025 and reminds you to "change both batteries".

Part Number CR2025
Lift Plastic Flap Cover
Pry Out 2nd Battery
Flip up the plastic cover to access the second battery.

Gently pop out the second battery with the flathead screwdriver.

The OEM original batteries in the fob for this 2014 Fusion were Panasonic CR2025 3 volt coin cells.

Install 2nd Battery
Install New Batteries
2nd Battery "+" Side Down
Insert a new # CR2025 battery in to the bottom socket with the "+" positive side facing up towards you.

Close the plastic cover over the first battery in the bottom of the fob.

Install the second CR 2025 battery in to the top socket with the "-" side facing up towards you.


Line Up Two Halves Fob
Snap Together Key Fob
Flush At Every Edge
Line up the two halves of the key fob and push them back together.

When I was attempting to re-assemble the key fob, the silver key ring loop on the bottom of the fob popped off.

Silver Part Popped Off
Slide On Silver Trim Piece
Silver Piece Re-Attached
I had to take apart the two halves of the fob in order to re-attach the silver key ring loop.

Slide the silver plastic piece back in to place on the top half of the fob.

Lower Battery Holder
Snap In To Place
Replace Metal Ignition Key
Lower the back half of the fob, which contains the two batteries, on to the top half of the fob.

Gently snap the two halves back together.

If you removed the emergency / back up metal ignition key, re-insert it back in to place.

Emergency Key Replaced
Line Up Rear Cover
Snap Cover In Place
Line up the rear cover of the fob and gently pop it back in to place.
Cover Flush On Fob
Fob Re-Assembled
Test New Key Fob Battery
Make sure that the rear cover is flush against the key fob at every edge.

To test the new key fob battery, stand near your Fusion and press the "Unlock" or "Lock" buttons.

If the new battery is working properly, you should see the parking lights flash and hear the door locks opening or closing.

Be sure to record the battery change in your vehicle's service records.

For more, check out my other 2013-2016 Ford Fusion DIY Repair & Maintenance Guides.

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