Genuine OEM Audi Engine Coolant Hose, part number 04L121157S. This hose is a critical component of the engine cooling system, designed to transport coolant efficiently to regulate engine temperature. Its specific routing and durable construction ensure reliable coolant flow. Measuring approximately 16 cm in length, this hose is engineered to withstand high temperatures and pressures. Choosing a genuine OEM hose ensures precise fitment, correct material composition, and long-term durability, preventing leaks and maintaining cooling system integrity.