The contact owns a 2018 Kia Sportage. The contact stated that while driving a knocking noise was suddenly present coming from the engine and warning messages were present on the dashboard display before the vehicle stalled. Later while attempting the start the engine a burning odor and smoke were present coming from the engine compartment. The engine was turned off and the smoke dissipated. The cause of the failures was not determined. The local dealer and manufacturer were notified of the failure. The failure mileage was 86,000.