Select Your Vehicle

Select by Brand

Get Email Exclusives

Sign up for email updates on the latest exclusive offers

Brake Booster

 Shop Brake Booster

Power brakes use a brake booster for them to work with minimal pressure on the pedal. When the booster breaks, the pedal gets much harder to push. Difficulty in using the power brakes can make it trickier for you to slow down the vehicle or bring it to a halt. You may also have to deal with longer stopping distances.

To learn more about this part of the power brakes, we've compiled some of the commonly asked questions and their answers.

What are the different parts of the booster?

The brake booster is composed of these parts: booster piston, return spring, control valve, body, and reaction valve. Its body comes with a couple of chambers. These chambers are for variable pressure and for constant pressure. They are set apart by a diaphragm.

How does it work?

The booster uses engine vacuum to operate as it should. Its flexible diaphragm removes air from one side when the brake pedal is pushed. This creates atmospheric pressure that will push on the diaphragm's opposite side. The booster then pushes on the brake master cylinder through pressure. The diaphragm and the booster's connection to the master cylinder makes things work.

How can you choose the right kind of brake booster for your vehicle?

The size of the booster may vary as well as the number of diaphragms used. To find the right type of booster for your vehicle, be very specific in your search. Use the vehicle's complete details such as the year, make, model, and engine type to look for the right brake component. With these specs, auto parts stores can provide you with the right set of options.

When would be the best time to replace a brake booster?

Some car parts have to be changed after a certain mileage for preventive maintenance. In the case of the booster, there's no specific mileage or time interval. The part can last for a long while, even for many decades or the same time as the vehicle. But, these may also wear out faster because of some factors. From time to time or during brake service, you may want to check this brake component for signs of wear. Also watch out for obvious symptoms such as when the brake pedal becomes harder to press.

Why does a booster fail or wear out prematurely?

A leaking master cylinder may lead to a faulty booster, as the fluid gets inside it. If the master cylinder isn't fixed right away, this may cause damage to the booster. The brake fluid may decompose the diaphragm. Common problems with the booster also include lack of vacuum and diaphragm crack.

How can you keep the brake booster from wearing out too soon?

If you notice any brake problem or some changes in the brake power, the entire brake system has to be checked as soon as possible. Replace or repair the busted parts so that other brake components won't be affected. For instance, master cylinder leaks should be fixed right away or else the booster may get ruined. Regular brake system checkup and service can prevent the premature wear of some brake parts such as the booster.

Brake Booster Articles

  • Brake Booster Guide

    Power brakes use a brake booster for them to work with minimal pressure on the pedal. When the booster breaks, the pedal gets much harder to push. Difficulty in using the power brakes can make it trickier for you to slow down the vehicle or bring it to a halt. You may also have to deal with longer stopping distances.

    To learn more about this part of the power brakes, we\'ve compiled some of the commonly asked questions and their answers.

    What are the different parts of the booster?

    The brake booster is composed of these parts: booster piston, return spring, control valve, body, and reaction valve. Its body comes with a couple of chambers. These chambers are for variable pressure and for constant pressure. They are set apart by a diaphragm.

    How does it work?

    The booster uses engine vacuum to operate as it should. Its flexible diaphragm removes air from one side when the brake pedal is pushed. This creates atmospheric pressure that will push on the diaphragm\'s opposite side. The booster then pushes on the brake master cylinder through pressure. The diaphragm and the booster\'s connection to the master cylinder makes things work.

    How can you choose the right kind of brake booster for your vehicle?

    The size of the booster may vary as well as the number of diaphragms used. To find the right type of booster for your vehicle, be very specific in your search. Use the vehicle\'s complete details such as the year, make, model, and engine type to look for the right brake component. With these specs, auto parts stores can provide you with the right set of options.

    When would be the best time to replace a brake booster?

    Some car parts have to be changed after a certain mileage for preventive maintenance. In the case of the booster, there\'s no specific mileage or time interval. The part can last for a long while, even for many decades or the same time as the vehicle. But, these may also wear out faster because of some factors. From time to time or during brake service, you may want to check this brake component for signs of wear. Also watch out for obvious symptoms such as when the brake pedal becomes harder to press.

    Why does a booster fail or wear out prematurely?

    A leaking master cylinder may lead to a faulty booster, as the fluid gets inside it. If the master cylinder isn\'t fixed right away, this may cause damage to the booster. The brake fluid may decompose the diaphragm. Common problems with the booster also include lack of vacuum and diaphragm crack.

    How can you keep the brake booster from wearing out too soon?

    If you notice any brake problem or some changes in the brake power, the entire brake system has to be checked as soon as possible. Replace or repair the busted parts so that other brake components won\'t be affected. For instance, master cylinder leaks should be fixed right away or else the booster may get ruined. Regular brake system checkup and service can prevent the premature wear of some brake parts such as the booster.