This thing is really the heart of your braking system. Basically, when you push the brake pedal, you’re pushing on a piston inside the master cylinder. That piston then pushes brake fluid through the lines to the brakes at each wheel. It builds pressure, and that pressure is what actually clamps down on the rotors or drums to stop the car. It also holds the pressure in the lines when you’re sitting still, so you don’t lose your brake power. Some have one piston, some have two, depending on the vehicle. Think of it as the starting point for everything brake – related. It takes the force from your foot and multiplies it, sending it along to all four corners of the car. Without it working correctly, you simply won't be able to stop. It’s a pretty critical component, clearly. It's also usually mounted right up on the firewall, sort of hidden away. It's important because, well, it controls stopping. If the master cylinder fails, you’ll likely notice if you have a spongy brake pedal, or if it slowly sinks to the floor when you're holding it. Sometimes, you'll get a complete loss of brakes, which is obviously a big deal. It’s something you really don’t want to mess around with. A failing master cylinder acts like a shield slowly crumbling – you might have some braking ability at first, but it’ll steadily get worse. You can find replacements pretty easily, sites like Fixparts Online have a good selection. It’s one of those things that’s worth keeping an eye on and addressing immediately if you suspect an issue. Quality you can count on: Brake Master Cylinder (MPN PMD147) comes with a 12-month warranty!

About TRW

TRW is renowned for its precision-engineered steering parts that meet or exceed OEM standards.

Why Choose TRW?

• TRW parts are known for being reliable and lasting a long time, meaning fewer repairs for you. • We make parts for many different types of vehicles, so there's a good chance we have what you need. • TRW has been a trusted name in auto parts for over 100 years – we have a lot of experience. • Our parts meet or exceed the standards set by car manufacturers, so you can be confident in their quality and safety. TRW delivers excellence, FixParts Online delivers to your door.