While driving on the highway, the engine of my 2014 Hyundai Sonata suddenly seized without any prior warning. There were no preceding symptoms such as warning lights, unusual noises, or performance issues that might have indicated an impending failure. At the time of the engine seizure, I also lost power steering and power brakes, which severely compromised my ability to control the vehicle and led to a dangerous situation in fast-moving traffic. I later discovered that vehicles equipped with the Theta II engine have experienced similar issues, suggesting a potential safety-related defect. I am reporting this incident as a serious safety concern and request that NHTSA investigate this matter further.