Ford Fiesta Clutch Master Cylinder CV2Z-7A543-A

This is a replacement clutch master cylinder for the 2014-2019 Ford Fiesta with the 1.6L four-cylinder and a manual transmission. It replaces Ford part number CV2Z-7A543-A. The bore is stamped 19.05 mm (3/4 in) on the body, the same as the original.

The master cylinder sits at the clutch pedal on the firewall. The pedal pushrod clips into the rear, a feed hose comes in from the fluid reservoir, and the pressure line runs from the outlet to the slave cylinder at the transmission. When the seals inside wear, fluid bypasses the piston and the pedal loses pressure.

Common signs of a failing clutch master: the pedal goes soft or sinks to the floor, the pedal stays down and comes back up slowly, the car grinds going into first or reverse because the clutch will not fully release, or there is brake fluid on the carpet under the pedal. If the reservoir level has not dropped and nothing is wet under the car, the leak is usually past the rear seal into the cabin.

Before you install it, hold the new cylinder next to the old one and check that the mounting flange, the pushrod end and both line fittings match. Bleed the system at the slave cylinder bleeder after install until there is no air in the fluid, then check that the pedal is firm and the clutch releases fully with the engine running.