Genuine OEM Volkswagen Air Conditioning Compressor, part number 3D0820803S. This compressor is the heart of the vehicle's A/C system, circulating refrigerant to provide cooling. It is mounted to the engine block and driven by the accessory belt. Manufactured to exact specifications for efficient and reliable performance. Genuine OEM compressors ensure proper sealing, correct internal tolerances, and optimal refrigerant flow for effective climate control.