Genuine OEM Audi Expansion Tank Hose, part number 5Q0121449A. This hose is a crucial component of the engine cooling system, responsible for transferring coolant to and from the expansion tank. Its specific routing and material ensure efficient coolant circulation and pressure regulation. Made from durable, heat-resistant black rubber, it measures approximately 0.26m in length. Using a genuine OEM hose ensures correct routing geometry and resistance to engine coolant, preventing leaks and maintaining optimal engine temperature.

Catalogue entry: HOSE.