The contact owns a 2019 Hyundai Kona. The contact stated upon starting the vehicle, the vehicle made an abnormal sound. Additionally, the contact stated while driving at various speeds, the vehicle made an abnormal knocking and clicking sound. The contact stated that the vehicle had experienced engine hesitation intermittently, and the failure became permanent. The contact stated that the vehicle was experiencing excessive oil consumption. The contact had noticed that the oil level was significantly low, and the oil was significantly black at 500 miles after an oil change. The contact stated that on other occasions, the oil was significantly black while at the normal full. The contact stated that while his wife was driving 20 MPH uphill, the vehicle stalled and started rolling backwards. Several unknown warning lights were illuminated. The vehicle lost power steering and braking functionality, causing the driver to lose control of the vehicle. The vehicle then slowly rolled back off the road and struck a small tree. The contact did not sustain any injuries. The vehicle was restarted after an hour and half. The contact stated that the vehicle stalled while driving 10 MPH on another occasion and was able to restart after 15 minutes. The vehicle was taken to the dealer, where the fault codes were cleared; however, the failure persisted. The vehicle was taken to the dealer, where DTC: P0301 was retrieved. The dealer diagnosed that cylinder #1 had a misfire due to the valve cover gasket leaking oil into cylinder #1. The dealer determined that the valve cover gasket, the spark plugs, and the oil filter needed to be replaced. Additionally, the dealer recommended an engine restoration and fuel induction service. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 21V301000 (Engine); however, the VIN was not included. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 40,000.

- Nashua, NH, USA

The contact owns a 2019 Hyundai Kona. The contact stated while driving 45 MPH, the accelerator pedal was depressed; however, the vehicle was losing motive power. The contact stated that the vehicle then stalled. The contact pulled over and waited approximately 20 minutes before restarting the vehicle. The contact stated that the failure was intermittent but had occurred at various speeds. The contact stated that the check engine warning light only recently illuminated. Additionally, the contact stated that the vehicle had to be taken for an oil change monthly. The contact stated that there was no indication of an oil leak on the driveway. The contact had taken the vehicle to a local dealer however, the dealer was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 117,000.

- Phillipsburg, NJ, USA