Genuine OEM Audi Thermostat Housing Assembly, part number 06E121111AT. This critical component encloses the engine's thermostat, precisely regulating the flow of coolant to maintain optimal engine operating temperature. Proper temperature control is essential for engine efficiency and longevity. Constructed from durable, heat-resistant plastic, this assembly measures approximately 0.164 m in length and weighs 0.2248 kg. Using a genuine OEM thermostat housing ensures accurate temperature regulation and leak-free performance, preventing engine overheating or undercooling.