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Brake Boosters & Master Cylinders

Nothing is worse than hitting the brakes and your vehicle not stopping when you expect it to, or worse yet, not braking at all. It is important to ensure your brakes are in proper working order and correct for your application. JEGS offers brake boosters and master cylinders to help you stop quickly from top manufacturers including Right Stuff, Wilwood, Leed Brakes, Tuff Stuff, JEGS, and others. All master cylinders and brake boosters are made from high quality components and assembly to provide long-lasting performance. Browse our full line of brake booster and master cylinder options for your next project.

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There's few feelings worse than stepping on the brake pedal and not stopping until you're halfway through an intersection. A feeling that's almost that unsettling is when you're holding your foot on the brake, transmission in gear, and the brake pedal slowly sinks to the floor. That's a sure sign that the master cylinder is starting to fail. Master cylinder rebuild kits are available, but why not just replace the whole unit with one of our brake booster and master cylinder sets from top brands like Wilwood, Right Stuff, Leed Brakes, Tuff Stuff or JEGS?

Brake booster/master cylinder sets are a pretty common setup, with the booster using engine vacuum to multiply the force you're putting on the brake pedal, for more responsive braking and shorter stopping distances. A failing brake booster may hiss like a vacuum leak when you step on the brakes, and braking will require a much harder effort - stepping on the brake pedal might be about like stepping on a rock. Brake fluid around the master cylinder or booster are also a dead giveaway of problems. In some cases, the Brake warning light on the dashboard might be illuminated, although that usually doesn't happen until things are pretty bad.

Along with master cylinders and brake boosters, this is also where you can find related parts like master cylinder gaskets, master cylinder braces, slave cylinders for hydraulic clutch setups and conversion kits to upgrade from old-style non-power brakes over to power assist brakes. As always, do a thorough diagnosis of your braking system to be sure of the parts you need to replace, and be sure of your vehicle's year/make/model and engine size before ordering. Don't put your safety and that of everyone else at risk when you're on the road!

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What Does a Brake Booster Master Cylinder Do?

A brake booster master cylinder is a critical component of a vehicle's braking system. It consists of two main parts: the brake booster and the master cylinder. Together, they play a key role in ensuring your vehicle's brakes function effectively and safely.

Brake Booster: The brake booster, often referred to as a vacuum booster, is responsible for amplifying the force you apply to the brake pedal. It uses engine vacuum to assist in applying force to the master cylinder when you press the brake pedal. This assistance makes it easier to engage the brakes and allows for shorter braking distances.

Master Cylinder: The master cylinder is where hydraulic pressure is generated when you press the brake pedal. It converts the mechanical force from the brake booster into hydraulic pressure, which is then transmitted to the brake calipers or wheel cylinders. This hydraulic pressure causes the brake pads or shoes to make contact with the rotors or drums, resulting in braking action.

How Do I Know If My Brake Booster or Master Cylinder Is Bad?

Recognizing signs of a bad brake booster or master cylinder is crucial for maintaining safe braking performance. Here are common symptoms that may indicate an issue:

  • Soft or Spongy Brake Pedal: If the brake pedal feels soft, spongy, or goes to the floor when you press it, it could be a sign of a failing master cylinder or air in the brake lines.
  • Difficulty Braking: If you need to apply excessive force to the brake pedal to stop the vehicle, the brake booster or master cylinder may be malfunctioning.
  • Brake Fluid Leaks: Visible brake fluid leaks around the master cylinder or brake booster are clear indicators of a problem.
  • Warning Lights: The vehicle's brake warning light on the dashboard may illuminate if there's an issue with the braking system.

If you experience any of these symptoms, it's essential to have your brakes inspected and repaired by a qualified mechanic promptly. Ignoring brake issues can jeopardize your safety on the road.

How Much Does It Cost to Replace a Brake Booster Master Cylinder?

The cost of replacing a brake booster master cylinder can vary depending on several factors, including the make and model of your vehicle, the brand and quality of replacement parts, and labor costs. On average, the total cost for parts and labor can range from $300 to $800 or more.

To get an accurate estimate for your specific vehicle, it's advisable to consult with a reputable auto repair shop or mechanic. They can assess the condition of your braking system and provide a detailed cost estimate based on your vehicle's needs.

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