The contact owns a 2019 Hyundai Elantra. The contact stated while driving at an undisclosed speed, the contact stated that the high-beam headlights became inoperable. The contact stated that the high-beam headlights failed to function properly. The contact stated that the bulbs for the high-beam headlights were replaced; however, the failure persisted. The contact engaged the parking brake to stop the vehicle. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 52,000.