Genuine OEM Audi Coolant Nozzle, part number 0D4409089. This coolant nozzle is a component within the cooling system, designed to direct the flow of coolant to specific areas for efficient heat dissipation. It is typically made of durable plastic or metal to withstand engine temperatures and pressures. Genuine OEM coolant nozzles ensure the correct spray pattern and flow rate, vital for preventing engine overheating.