Genuine OEM Audi A/C Compressor Mount Spacer, part number 4KE121277A. This spacer is crucial for correctly positioning the A/C compressor mount, ensuring proper alignment and reducing stress on the compressor and belt system. It is installed between the compressor and its mounting bracket. Measuring approximately 37mm in diameter and 5mm thick, this metal spacer weighs 0.020 kg. Using a genuine OEM spacer guarantees the precise dimensions and material strength needed for reliable A/C system operation and longevity.