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Ford Mustang Key Fob Battery Replacement Guide
How to change the battery in the key fob remote control of a redesigned fifth generation 2010 to 2014 Ford Mustang.

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2012 Mustang Key Fob
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Notch At Bottom Corner
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Insert Blade of Screwdriver

This automotive maintenance tutorial was specifically written to assist owners of the face lifted 5th generation (2010, 2011, 2012, 2013 & 2014) Ford Mustang in changing the key fob battery.

Owners of other Ford or Lincoln vehicles with similar key fobs such as the Fusion, Focus, Taurus, Fiesta, Escape, Edge, Explorer, Flex, MKZ, MKX, MKS, and MKT may also find these DIY instructions to be helpful.

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

The only tool needed to replace the battery is a small flathead screwdriver used to pry off the rear cover. You may also use a coin, butter knife, key or nail file.

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Pry Off Rear Cover
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Gently Pry Out Battery
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Old Battery Removed
The first step is to locate the small notch at the bottom corner of the key fob near the red "Panic" alarm button.

Insert the blade of the screwdriver in to the notch and gently pry off the rear cover of the fob.

Either turn over the fob and gently tap it until the old battery falls out, or carefully pry out the old battery from the holder with the small flathead screwdriver.

Try to avoid damaging the metal electrical contacts or the green circuit board with the tip of the screwdriver.

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Insert New CR 2032 3V
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"+" Positive Side Up
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Rubber Gasket In Rear
Insert a new CR2032 3 volt coin cell battery in to the slot with the "+" positive side facing up towards you.

If the rubber gasket fell out of the rear cover when you disassembled the fob, re-insert it.

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Snap On Rear Fob Cover
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Fob Halves Flush Together
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Test Battery - Parking Lights
Line up the two halves of the key fob and gently snap them back together.

Make sure that the rear cover is flush against the key fob with no parts of the rubber gasket exposed.

Test the new battery by standing next to your Mustang and pressing the "Lock" or "Unlock" buttons. If the fob is working properly, you should see the parking lights flash.

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

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