One problem related to 12v/24v/48v battery has been reported for the 2021 Hyundai Kona. The most recently reported issues are listed below.
The contact owns a 2021 Hyundai Kona. The contact stated that while driving at 20 mph, the vehicle inadvertently stalled and lost electrical power. The battery warning light, engine warning light, and an unknown warning light were illuminated. The contact veered to the side of the road. The contact was unable to restart the vehicle after several attempts. The contact waited an hour and was able to restart the vehicle and drive; however, the vehicle was shaking while driving. The contact stated that the failure reoccurred while driving. The vehicle was towed to the dealer who diagnosed that the engine had failed and needed to be replaced. The dealer advised the contact that the vehicle would be repaired at her own expense. The contact referenced NHTSA campaign number: 21v301000 (engine). The manufacturer was notified of the failure but did not provide any assistance. The vehicle was not repaired. The failure mileage was approximately 21,605.