Genuine OEM Volkswagen Coolant Hose, part number 4M0819337BM. This essential hose is designed to transport engine coolant, playing a critical role in maintaining optimal engine operating temperatures. It features a quick-release connection for efficient installation and removal within the cooling system. Manufactured from high-quality, heat-resistant rubber compounds, this hose ensures leak-free performance and durability. Using a genuine OEM coolant hose guarantees precise fitment, correct material composition, and resistance to thermal cycling and chemical degradation, preventing leaks and cooling system failures.