Genuine OEM Volkswagen Coolant Air Guide, part number 5H0121284. This air guide directs airflow to the coolant reservoir and potentially the electric vacuum pump for proper system function. It is located on the front of the cooling assembly, identified as part 5 in the diagram. Made from high-quality plastic, it ensures durability and correct form. Genuine OEM parts are manufactured to precise specifications to ensure proper airflow and cooling system efficiency.