Genuine OEM Audi Cylinder Head Bolt, part number 077103385D. This critical fastener secures the cylinder head to the engine block, maintaining the integrity of the engine's combustion chambers. It is located within the engine assembly, connecting major components. Measuring approximately 0.13m in length, this bolt is designed for precise fitment. Using genuine OEM cylinder head bolts ensures correct torque specifications and material strength, preventing leaks and maintaining engine compression.