If the remote key is not working properly, try replacing the battery with a new one.
Battery Type: CR2032
To replace the battery:
1. Insert a slim tool into the slot and gently pry open the cover.
2. Using a screw driver, remove the battery cover.
3. Remove the old battery and insert a new battery. Make sure the battery position is correct.
4. Reinstall the battery cover and key cover in the reverse order of removal.
If you suspect your remote key might have sustained some damage, or you feel your remote 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) 2018-2021 Service Manual: Front Door Latch Repair procedures
Replacement
1.
Remove the front door outside handle.
(Refer to Front Door - "Front Door Outside Handle")
2.
Loosen the front door latch mounting screws.
Tightening torque :
6.9 - 10 ...
Hyundai Kona (OS) 2018-2021 Service Manual: Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box.
(Refer to Body - "Glove Box Upper Cover Assembly")
3.
Remove the smart key unit. ...