Genuine OEM Audi A/C Receiver Drier, part number 4E0820189G. This essential component in the air conditioning system is responsible for removing moisture and contaminants from the refrigerant. By filtering out impurities, it protects other delicate A/C components, such as the compressor, from damage and ensures the system operates efficiently to provide effective cooling. Weighing approximately 0.715 kg and measuring 0.23 meters in length, this genuine OEM drier guarantees proper filtration capacity and material compatibility, crucial for the longevity and performance of the entire A/C system.