Genuine OEM Audi Crankshaft Lower Bearing Shell, part number 079105591J. This precision-engineered component is designed to support the crankshaft within the engine block, providing a low-friction surface for smooth rotation. It is positioned as the lower half of a main bearing, crucial for the engine's internal mechanics. Weighing 0.039 kg, this genuine OEM bearing shell ensures factory tolerances and material composition, critical for minimizing wear, reducing friction, and ensuring the long-term reliability of the engine.