The contact owns a 2018 Ram 1500. The contact stated while driving at an undisclosed speed, the vehicle stalled with several unknown warning lights illuminated. The contact stated that the steering wheel had seized. The vehicle was towed to the dealer where it was diagnosed with coolant intrusion into the engine, which caused 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 and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 186,000.