Genuine OEM Volkswagen Coolant Hose, part number 4M0122109BA. This hose is responsible for circulating engine coolant, maintaining optimal operating temperatures. It connects to the coolant reservoir and features an integrated quick-release mechanism for efficient installation and removal. Measuring 0.16m in length and weighing 0.0668 kg, it is engineered for precise routing and fitment. Choosing a genuine OEM coolant hose ensures the correct material composition to withstand high temperatures and pressures, proper internal diameter for optimal flow, and reliable quick-release functionality, preventing leaks and maintaining cooling system efficiency.