The contact owns a 2020 Hyundai Elantra. The contact stated while driving approximately 30 MPH at night, the high beam headlight became inoperable. The contact stated that the high beam on the sign was illuminated on the instrument panel. The contact had taken the vehicle to a dealer who diagnosed that the high beam headlights had failed due to a shutter in the headlight housing that opened and closed while needed. The contact was informed that the headlamp housing needed to be replaced. The vehicle was not repaired. The manufacturer was not informed of the failure. The contact researched online and related the failure to Technical Service Bulletin: 20-BE-004H Headlamp Replacement (Exterior Lighting). The failure mileage was approximately 57,000.