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: Back-up Lamps Repair procedures
Removal
LHD
1.
Disconnect the negative (-) battery terminal.
2.
Remove the rear bubper.
(Refer to Body - "Rear Bumper")
3.
Loosen the screw and then remove ...
Hyundai Kona (OS) 2018-2024 Service Manual: Special service tools
Special Service Tools
Tool Name / Number
Illustration
Description
Alternator pulley remover wrenchh
09373-27000
Removal and installation of alternator pulley
...