Genuine OEM Audi Engine Coolant Hose, part number 4M1121036. This hose is designed to transport coolant to and from the engine, playing a critical role in maintaining optimal engine operating temperature. It is an integral component of the engine cooling system. Weighing approximately 0.15 kg and measuring 0.335 m in length, this hose is constructed from durable, heat-resistant materials. Choosing a genuine OEM hose ensures correct routing geometry, proper fluid resistance, and a leak-free connection for long-term reliability.