Genuine OEM Volkswagen Crankcase Adapter Sleeve, part number 059103826B. This small but critical sleeve is designed to provide precise alignment and a secure connection between various engine components within the crankcase assembly. It plays a vital role in maintaining the correct spacing and orientation of parts, which is essential for the engine's smooth operation and longevity. Weighing only 0.006 kg with dimensions of 0.018m x 0.018m x 0.02m, its exact fit is paramount. Choosing a genuine OEM sleeve ensures the correct material properties and dimensional accuracy, preventing premature wear and potential engine issues.