The contact owns a 2015 Kia Soul. The contact stated that while driving approximately 65 mph, a thumping noise occurred under the vehicle and suddenly the speed was reduced and the vehicle would no longer accelerate. While coasting to the side of the road smoke was present coming from under the hood of the vehicle. Moments later flames from under the hood engulfed the vehicle. The fire department was called to the scene and extinguished the flames. No injuries were reported. The vehicle was destroyed. A fire and a police report were taken and the vehicle was towed away. The cause of the failure was not determined. The manufacturer and local dealer were not notified of the failure. The failure mileage was 85,000.