Genuine OEM Volkswagen Clutch Master Cylinder, part number 1J1721388G. This critical component converts the mechanical force from the clutch pedal into hydraulic pressure, enabling smooth clutch engagement and disengagement. It is typically mounted near the clutch pedal assembly and is configured for Left-Hand Drive vehicles. Weighing 0.161 kg, this cylinder is built to exact factory specifications. Using a genuine OEM master cylinder ensures correct hydraulic pressure, reliable clutch operation, and long-term durability.