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Kia Optima Key Fob Battery Replacement Guide
How to change the battery in the key fob remote control of a 3rd generation 2011 to 2015 Kia Optima with pictures.

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Paul B. Michaels
Author & Photographer
Auto Mechanic Since 1989

2013 Optima Key Fob
Back Side of Key Fob
Notch At Top
This automotive maintenance tutorial was specifically written to assist owners of the third generation (2011, 2012, 2013, 2014 & 2015) Kia Optima in changing the battery in the key fob remote control for the keyless entry system.

Owners of other Kia and Hyundai vehicles with similar key fobs such as the Forte, Cadenza, Rio, Soul, Sedona, Sorento, Sportage, Sonata, Accent, Elantra, Veloster, Azera, Tucson, Santa Fe and Genesis 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 various manufacturers such as Panasonic, Sony, Energizer, GE and Maxell.

The only tool needed to replace the battery is a small flathead screwdriver.

You may also use a plastic pry bar tool, a nail file, a butter knife or a key.

Insert Screwdriver In Notch
Pry Open Two Halves
Push Out Old Battery
Insert the blade of the small flathead screwdriver in to the notch at the top edge of the key fob closest to the "Lock" button.

Gently pry apart the two halves of the key fob.

Use your fingernail or the small flatheads screwdriver to push the old batter out of its socket.

Old Battery Removed
Panasonic CR2032 3V
Slide In New Battery
Slide a new CR2032 3 volt battery in to the holder with the "+" positive side facing up towards you.
Line Up Two Halves Fob
Snap Together Key Fob
Test New Key Fob Battery
Line up the two parts of the key fob and gently snap them back together.

Make sure the two halves are flush together all the way around.

Test the new battery by standing near your Optima and pressing the "Lock" and/or "Unlock" buttons.

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

For more, check out my other Kia Optima Repair & Maintenance Guides.

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