This H4163030000A0 clutch master cylinder is an OEM hydraulic control component. It converts the pedal stroke into hydraulic pressure to drive the clutch slave cylinder and realize clutch separation and combination. The assembly includes cylinder body, piston, sealing cups and return spring. It adopts high-strength aluminum alloy cylinder body and high wear-resistant sealing parts, featuring stable pressure output and good anti-leakage performance. The internal structure is precisely machined to ensure smooth movement of piston without jamming. Every unit undergoes hydraulic pressure test and leakage inspection before shipment. It is a reliable replacement spare part for leaking or failed clutch master cylinders.