Genuine OEM Audi Engine Piston Assembly, part number 07K107065K. This critical internal engine component is designed to convert the pressure generated by combustion into mechanical energy, which is then transferred to the crankshaft. It operates within the engine's cylinders, forming a gas-tight seal with the cylinder walls via its piston rings. Weighing approximately 0.56 kg, this assembly is manufactured from high-strength materials to withstand extreme temperatures and pressures. Choosing a genuine OEM piston assembly ensures factory-specified tolerances, material integrity, and ring tension, which are essential for maintaining engine compression, preventing oil bypass, and ensuring the engine's long-term efficiency and power output.