Genuine OEM Audi Engine Coolant Hose, part number 4M0121449ED. This hose is an essential component of the engine cooling system, responsible for transporting coolant to maintain optimal engine operating temperatures. It connects directly to a heat exchanger, facilitating efficient heat dissipation. Made from durable rubber, this hose measures approximately 0.082 meters in length. Choosing a genuine OEM hose ensures correct routing geometry, resistance to coolant chemicals, and a secure, leak-free connection for reliable engine cooling.