Genuine OEM Volkswagen Grooved Ball Bearing, part number 021903221D. This bearing is a critical component for rotating assemblies, commonly found in alternators, providing smooth, low-friction rotational support. It features a precisely machined grooved race to accommodate radial and axial loads. Manufactured to exact specifications, it ensures minimal vibration and noise. Genuine OEM bearings are essential for their high-quality materials and precise tolerances, guaranteeing a long service life and optimal performance in demanding automotive applications.