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Hyundai Sonata Key Fob Battery Replacement Guide
How to replace the coin cell battery in the keyless entry remote control fob of a 2011, 2012 and 2013 Hyundai Sonata.

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Hyundai Sonata Key Fob
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Slot On Top of Fob
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Pry Apart Two Halves

This automotive "how-to" guide was specifically written to assist owners of the 6th generation (2011, 2012 & 2013) Hyundai Sonata in replacing a key fob battery.

Owners of other Hyundai or Kia vehicles such as the Elantra, Accent, Veloster, Tucson, Santa Fe, Veracruz, Genesis, Forte, Optima, Rio, Soul, Sedona, Sorento, Tiburon and Sportage may also find these DIY instructions to be helpful.

A replacement coin cell (A.K.A. button or watch) battery for the Hyundai Sonata key fobs is part # CR2032. It is available from various manufacturers such as Duracell, Energizer, Panasonic, GE, Sony and Maxell.

The only tool needed to change the battery is a small flathead screwdriver. You may also be able to use a coin, butter knife or other similar item to pry apart the two halves of the fob.

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Two Halves Separated
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Lift Off Top Cover
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Remove Rubber Buttons
The first step is to locate the small slot situated at the top of the key fob close to the "Lock" button. Insert the blade of the screwdriver into the slot and gently pry apart the two halves.

Lift off the top key fob cover, remove the rubber piece and eject the remote control unit from the bottom half of the fob.

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Lift Out Remote Control
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Push Out Old Battery
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Old Battery Removed
On the underside of the remote control unit, you'll see the old CR2032 coin cell battery in its slot. Use the small flathead screwdriver to push the old battery out of the slot.



 

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Panasonic CR 2032 3V
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Slide In New CR2032
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"+" Side Facing Up
Slide a new CR2032 3V battery straight into the slot with the "+"  side facing up towards you.
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Insert Buttons & Remote
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Remote Control Installed
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Replace Top Cover
Re-insert the remote control unit into the back cover with the battery facing down. Place the rubber piece over the remote control unit with the buttons facing up. Then lower the top half of the fob over the buttons.
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Snap Two Halves Together
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Double Check Edges
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Testing New Fob Battery
Gently snap together the two halves of the key fob until they are flush on all sides.

Test the new key fob battery by standing near your Hyundai Sonata and pressing the "Lock" or "Unlock" buttons.

For more, check out my Hyundai Sonata Repair & Maintenance Guides page.
 

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