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Chrysler 300 Key Fob Battery Replacement Guide
How to change the battery in the key fob remote control for a 2nd generation 2011 to 2017 Chrysler 300 sedan.

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2016 300C Key Fob
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Rear of Key Fob
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Ignition Key Release Switch

This automotive maintenance tutorial was specifically written to assist owners of the second generation (2011, 2012, 2013, 2014, 2015, 2016 & 2017) Chrysler 300, 300C or 300S sedan in changing a dead battery in the key fob remote control for the keyless entry system.

Owners of other Chrysler, Dodge, Jeep and RAM vehicles such as the Town & Country, 200, Pacifica, Avenger, Charger, Journey, Challenger, Dart, Durango, Magnum, Grand Caravan, Grand Cherokee, Renegade, Wrangler, Compass, Liberty, Patriot, ProMaster, 1500 and C/V Tradesman minivan may also find these DIY instructions to be helpful.

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

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

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Pull Out Metal Ignition Key
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Ignition Key Removed
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Pry Apart Two Halves
The first step is to turn over the key fob and locate the grey metal switch.

Slide the switch to release the metal ignition key and remove it from the socket.

Set the backup metal ignition key aside in a safe place.

To prevent from scratching or marring the plastic surfaces, either cover the screwdriver with a thin micro fiber cloth or use a plastic automotive pry bar tool.

Insert the blade of the screwdriver in to the slot where the metal key used to reside and gently pry apart the two halves of the key fob housing.

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Key Fob Separated
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Pull Out Old Battery
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Old Battery Removed
Gently pry out the old battery from the socket in the back half of the fob housing with your finger nail or use a small flathead screwdriver.

Try to avoid bending or damaging the metal electrical contacts.



 

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Panasonic CR 2032 3V
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"+" Side Down
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Install New CR2032 Battery
Gently push a new CR2032 coin cell battery in to the holder with the "+" positive side facing down and the "-" negative side facing up towards you.
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New Battery Installed
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Line Up Front Cover
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Snap Together Fob
Line up the front cover with the back part of the key fob housing.

Gently push together the two halves of the key fob until they are flush together.

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Re-Insert Ignition Key
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Key Fob Re-Assembled
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Test New Key Fob Battery
Re-insert the backup / emergency metal ignition key in to the slot until it clicks in to place.

To test the new key fob battery, stand near your 300 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.

For more, check out all of my 2011-2017 Chrysler 300 DIY Repair & Maintenance Guides.
 

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