What component or system failed or malfunctioned, and is it available for inspection upon request?-Coolant/temperature sensor causing the vehicle to overheat, cylinder head to crack, and coolant leak into the engine. Safety jeopardized?-Yes, the car was then burning the coolant and it was entering the air and inhaled. Possible connection to a confirmed cancer case in the main driver. Has the problem been reproduced or confirmed by a dealer or independent service center?-Yes, it was reported to two separate Ford dealerships a total of 5 times. Each time the dealership told me they could not diagnose the problem. I took the car to an independent service center and it was confirmed the head was visibly cracked in 3 locations and the car was burning coolant and emitting it through the exhaust. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others?-The vehicle has been to Ford dealerships and inspected for service, recalls, and multiple times for this specific issue. Were there any warning lamps?-No warning lamps, no other symptoms prior to the failure. I purchased the vehicle from Fred Beans Ford, West Chester in Feb. 2016. In Oct. 2016 the vehicle overheated without any warning lamps or messages and it was towed to Fred Beans Ford. The service department stated there were no issues with the vehicle but replaced the temperature sensor that was recalled. The problem continued with the coolant level decreasing and no leaks