The contact owns a 2014 Kia Forte. The contact stated that while driving at an undisclosed speed, the vehicle overheated and then lost motive power. There was no warning light illuminated. The vehicle was towed to an independent mechanic where it was diagnosed and determined that the radiator had failed and needed to be replaced. Then the mechanic diagnosed the vehicle as coolant leak into the cylinder, causing engine failure. The contact was informed that the engine needed to be replaced. The radiator repair was performed. The vehicle was towed to the dealer, where it was diagnosed with coolant intrusion into the cylinders, causing engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 131,000.