Owner reviews for brake cylinder

GX brake cylinders are a 3 in 1 unit. I was quoted $2,700 for a new part from Toyota on my GX470.

I was able to buy mine on fcpeuro for less than 50$!! No modification required.

Brake master cylinder was absolutely shot and was not doing its best with the new GLI brake setup, so I managed to swap in a GLI 10.1" rotor type setup and it worked out very nicely.

I removed the brake master cylinder and wanted to inspect the internal seals... A faulty master cylinder would be spongy and soft to push its piston all the way in. A good master cylinder would be only soft when the lines are open, and would be hard, or require more force if the holes were plugged/sealed/closed. I used rubber stopper to plug the holes and performed the test: As you can see in the picture: in both tests it took almost same amount of force to push the piston. That indicated an internal leak, and a faulty master cylinder.

I just purchased my 02 LS430 with 137k for $2600, needed just a brake master cylinder and was good to go.

Nissan/Datsun F10 brake master cylinder

For $8 less they have the Raybestos #MC390406 "professional grade" on closeout with only 30 day warranty. I bought a similar Raybestos for my Toyota, and it's worked fine. "Professional grade" apparently means no instructions or bleeder houses are included.

$1,800 for a '91 Volvo 940 Turbo. It was running good, had ok tires, and got me through 2 years (needed a brake master cylinder after a year, though). Overall, ok deal... it scooted better after a manual boost controller, but the turbo was on it's way out.

Next job to tackle is the weak brakes. Going to start with a brake master cylinder replacement because when I'm sitting at a red light, the pedal goes from hard for about 20-30 seconds to softening up and going to the floor with no clamp force anymore until I pump the pedal again.