Hyundai Key Fob Battery Replacement
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Learn how to replace the battery on a Hyundai key fob. The most common battery size for Hyundai key fobs is CR2032.
At a Glance
- Battery: CR2032 on most Hyundai fobs (check the old battery)
- Tool: small flat screwdriver or a coin
- Time: about 5 minutes
- Tip: note the plus side before removing the old battery
- Dead fob: hold it against the start button to start the car
Watch the videos below to learn how to replace the Hyundai key fob battery and determine which battery size your Hyundai key utilizes.
Signs Your Hyundai Key Fob Battery Is Low
- You have to stand closer to the car for the buttons to work.
- A Key not detected or low key battery message on the dash.
- Push button start only works when you hold the fob against the start button.
- The fob LED is dim or does not light.
If a new battery does not fix it, see our guide to key fob not detected problems.
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How to Replace Hyundai Key Fob Battery
What you will need
- CR2032 Battery
Procedure
This video tutorial is for older Hyundai models.
- Use a flathead screwdriver to pry open the case. Be careful, and don’t point the screwdriver towards your hands. If the screwdriver slips, it can injure you.
- Carefully open the battery case and note the old battery. Pay attention to the (+) on the battery.
- Remove the old battery by sliding it out of the circuit board.
- Please insert the new battery, ensuring the positive (+) side of the battery is oriented the same way it was on the old battery.
- Align the critical fob case and close it by pressing the two halves together.
This video tutorial is for newer Hyundai models with a smart key fob.
- Press the tab and remove the metal key.
- Use the metal key to carefully open the fob by inserting it into the designated slot.
- Remove the old battery using a small screwdriver.
- Insert the new battery with the positive (+) side facing outward.
- Press the key fob back together until you hear two clicks.
- Place the metal key back into its designated slot.
- Snap the two halves of the Hyundai key fob back together securely.
These instructions should help you replace the key fob (keyless) remote battery on the Hyundai Elantra, Azera, Sonata, Genesis, Accent, Equus, Santa Fe, Sedona, Tucson, and Veloster.
Most Hyundai key fobs use a CR2032 battery, but we recommend opening the key to verify the battery size before purchasing a new one.
Are you looking to save money by performing and marinating your Hyundai yourself? Check out more Hyundai auto repair guides.
Frequently Asked Questions
What battery does a Hyundai key fob take?
Most Hyundai fobs use a CR2032 coin battery. Some older flip keys use a different size, so check the old battery before buying.
Do I need to reprogram my Hyundai key after changing the battery?
No. The fob keeps its programming when the battery is changed.
How do I start my Hyundai if the key fob battery is dead?
Hold the fob against the start button and press it with your foot on the brake. Some models have a backup slot instead.
Fantastic! I had NO SCREWS which most other instructions operate under. (2012 Tuscon)