Brake Master Cylinder Assembly — OEM‑fit Replacement 🛠️

This unit is the heart of your hydraulic brake system. It turns pedal force into stable line pressure so your vehicle stops straight, sure, and repeatable. A fresh assembly restores firm pedal feel, proper balance between front and rear brakes, and confidence on every trip 🚗.

Why you need it

With age, internal seals harden and the bore wears. Pressure then bypasses inside the cylinder, causing a soft or sinking pedal. Replacing the assembly brings back full hydraulic efficiency and shorter stopping distances.

How it works

Press the pedal and a pushrod drives dual pistons in the cylinder. Fluid flows from the reservoir, building pressure in two separate circuits to feed calipers and wheel cylinders. Return ports and check valves stabilize pressure, while ABS/ESC can modulate it without losing pedal feel ⚙️.

What happens if it’s failing

Symptoms include spongy pedal, pedal sinking at lights, longer stops, uneven braking, warning lamp, and fluid traces at the booster. Left unchecked, it can cause sudden loss of braking — a serious safety risk ⚠️.

Pro install tips

Always bench‑bleed the unit, use the correct DOT fluid, flush old fluid, torque lines carefully, and bleed all wheels. Inspect booster seal and hoses; replace any leaking parts 🧰.

Compatibility

• Land Cruiser Prado