Genuine OEM Jaguar Coolant Thermostat Housing, part number C2Z19929. This vital component is part of the engine cooling system, designed to house the coolant thermostat and manage the flow of coolant. It plays a crucial role in maintaining the engine's optimal operating temperature. Constructed from robust black plastic, it weighs approximately 0.385 kg. Opting for a genuine OEM thermostat housing ensures precise sealing surfaces, correct sensor mounting points, and resistance to thermal cycling and coolant chemicals, preventing leaks and ensuring accurate temperature regulation.