Genuine OEM Jaguar Crankshaft Main Bearing, part number C2Z30459. This essential engine component is a half-shell bearing designed to support the crankshaft within the engine block, allowing it to rotate smoothly with minimal friction. It forms part of the main bearing set that ensures proper alignment and lubrication of the crankshaft journals. Weighing approximately 0.033 kg, this bearing is manufactured to extremely precise tolerances. Using genuine OEM main bearings is crucial for maintaining correct oil clearances, preventing premature wear, and ensuring the long-term reliability and performance of the engine.