If the Smart Key is not working properly, try replacing the battery with a new one.
Battery Type: CR2032
To replace the battery:
1. Remove the mechanical key.
2. Use a slim tool to pry open the rear cover
of the smart key.
3. Remove the old battery and insert the new battery. Make sure
the battery position is correct.
4. Reinstall the rear cover of the smart key.
If you suspect your smart key might have sustained some damage, or you feel your smart key is not working correctly, it is recommended that you contact an authorized HYUNDAI dealer.
Information
An inappropriately disposed battery can be harmful to the environment and human health. Dispose of the battery according to your local law(s) or regulations.
Hyundai Kona (OS) 2018-2024 Service Manual: Repair procedures
Replacement
[Removal]
•
Put on gloves to prevent hand injuries.
•
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Hyundai Kona (OS) 2018-2024 Owners Manual: Parking Distance Warning (Reverse/Forward) system precautions
The Parking Distance Warning (Reverse/Forward) system may not sound consistently
depending on the speed and shapes of the objects detected.
The Parking Distance Warning (Reverse/Forward) system may malfunction
if the vehicle bumper height or sensor installation has been modified or damaged.
...