Genuine OEM Citroen Clutch Master Cylinder, part number 9812926180. This critical component converts mechanical force from the clutch pedal into hydraulic pressure, which then actuates the clutch slave cylinder for smooth gear changes. It is located within the clutch pedal assembly, typically mounted to the firewall. Weighing approximately 0.14 kg, this part is engineered for precise hydraulic operation. Choosing a genuine OEM master cylinder ensures correct fluid displacement, pedal feel, and long-term reliability, preventing premature wear and maintaining optimal clutch system performance.