The contact owns a 2018 Hyundai Santa Fe Sport. The contact stated that while driving approximately 10 MPH and making a right turn, the brakes malfunctioned causing the vehicle to slide off the road hitting a mailbox and stopping in the neighbor's yard. The contact indicated that when depressing the brake pedal, the vehicle began to slide and the pedal became hard when pressed a second time. During the incident, no injuries occurred. The vehicle was pulled from the yard by a tow truck but was still drivable. A police report was filed at the scene. The cause of the failure was not yet determined. The local dealer and manufacturer were not notified of the failure. The contact was informed that the vehicle was included in the NHTSA Campaign Number 22V810000(Service Brakes, Hydraulic). The failure mileage was 35,000.