Genuine OEM Volkswagen A/C evaporator, part number 4E0820103A. This component is a vital part of the climate control system, responsible for cooling and dehumidifying the air before it enters the cabin. It is located within the HVAC housing assembly. Genuine OEM evaporators are designed with the correct fin density and thermal transfer properties to ensure maximum cooling efficiency and proper airflow resistance, preventing common issues like icing or restricted cabin air flow.