Hyundai Kona (OS) 2018-2024 Owners Manual: If the engine will not start
If the engine doesn't turn over or turns over slowly
Be sure the shift lever is in N (Neutral) or P (Park) if it is dual clutch
transmission vehicle. The engine starts only when the shift lever is in N (Neutral)
or P (Park).
Check the battery connections to be sure they are clean and tight.
...
Hyundai Kona (OS) 2018-2024 Service Manual: Blind-Spot Collision Warning Unit Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the rear bumper.
(Refer to Body - "Rear Bumper")
3.
Remove the BCW unit after loosening the mou ...