Audi S4 Coolant Return Pipe / Line 8E0819373H

This genuine OEM Coolant Return Pipe (Part Number 8E0819373H) is specifically designed for the 2004-2006 Audi S4, including the Avant and Cabriolet variants with a 4.2L V8 engine. This vital component, also known as the Engine Coolant Overflow Hose, plays a crucial role in circulating engine coolant back to the cooling system, helping to regulate engine temperature and maintain optimal performance. Common issues associated with damaged or worn-out return pipes include coolant leaks and overheating, which can lead to significant engine damage. This authentic factory-original part ensures a precise fit and reliable operation, making it an essential replacement for any routine maintenance or repairs. This part is also compatible with various other OEM part numbers, including 8E0121321, 8E1819373T, and 8E0819378B, ensuring versatility and ease of sourcing. By choosing this OEM coolant return pipe, you are investing in quality and reliability that directly impacts your vehicle's functionality and longevity.