The contact owns a 2024 Kia Carnival. The contact stated that the vehicle was designed with a manual and an automatic control system that allowed the seats the move forward. The contact stated that he activated the automatic control button on the left side of the second-row driver's side seat to move the seat forward. The contact stated that the backrest of the seat lowered, and the seat moved forward abruptly within a second and struck the right side of his forehead. The contact sustained a bruise. The dealer was not notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 500.