Genuine OEM Audi A/C Receiver Drier, part number 4E0820189Q. This component is crucial for the air conditioning system, functioning to remove moisture and contaminants from the refrigerant. It is typically located in the high-pressure side of the A/C circuit, between the condenser and the expansion valve. Weighing approximately 0.717 kg, this part is built to precise factory specifications. Choosing a genuine OEM drier ensures proper filtration and moisture absorption, preventing damage to other expensive A/C components and maintaining optimal cooling efficiency.