Power Brakes

When the brake pedal is depressed, a vacuum builds up in the booster which amplifies the pedal force, pressing on the piston in the master cylinder. The piston raises the hydraulic pressure in the cylinder. This hydraulic pressure is then applied to each respective brake cylinder, and acts to press the brake pads and shoes against the rotating rotor discs and rotors. The resulting friction converts the rotational energy to thermal energy, stopping the vehicle.
There are two types of brake boosters used on the Mazda vehicle lineup. The single diaphragm unit, which can be overhauled. The tandem (dual) diaphragm unit, which is not serviceable and must be replaced as a unit.