Vacuum Brake Booster with Master Cylinder for Toyota SUV

This complete assist unit restores strong, predictable braking. It pairs a vacuum booster with a matched master cylinder, giving firm pedal feel and stable hydraulic pressure. Ideal for drivers who want OEM-level stopping power and long service life.

Why you need it ️

Over time, the diaphragm, check valve, or internal seals wear out. Replacing the assembly returns full vacuum assist, shortens stopping distance, and keeps pedal effort low—especially with larger tires or heavy loads.

How it works

Engine vacuum pulls on a diaphragm in the booster, multiplying your foot force. The connected master cylinder converts that assist into hydraulic pressure, sending fluid to calipers and rear cylinders for smooth, even braking.

What happens if it fails ⚠️

Hard pedal, longer stops, hissing noise, uneven braking, fluid leaks, or brake warning light. In severe cases, the engine may idle rough due to vacuum loss.

Pro tips ✅

Bench-bleed the master, use fresh DOT 3/4 fluid, inspect hoses and the one-way valve, and perform system bleed after install.

Compatibility

• Land Cruiser 100