If the Smart Key does not operate normally, you can lock or unlock the door by using the mechanical key.

Move the release lever in the direction of the arrow (1) and then remove the mechanical key (2). Insert the mechanical key into the key hole on the door.
To reinstall the mechanical key, put the key into the hole and push it until a click sound is heard.
Start-up
Loss of a smart keyHyundai Kona (OS) 2018-2026 Service Manual: High Mounted Stop Lamp Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the spoiler assembly.
(Refer to Body - "tailgate trim")
3.
Remove the high mounted stop lamp as ...
Hyundai Kona (OS) 2018-2026 Service Manual: Direct Electro Hydraulic Actuator Coupling Repair procedures
Inspection
•
All units are filled up with coupling fluid (ultra-low viscosity
ATF) prior to shipping. Inspection, fill-up, and replacement
of coupling fluid is therefore n ...