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Buy Brake Master Cylinders at great prices from Opie.
The brake master cylinder's job is to convert the pressure created by your foot pressing down on the brake pedal into hydraulic pressure, which build up when brake fluid becomes trapped. There are many components to the master cylinder system including: bore, brake fluid reservoir, fluid level sensor, pistons and more.
Most modern vehicles usually have dual master cylinders, each with a different system of brake-circuit operation. If one cylinder fails (perhaps through the loss of brake fluid), the other will be able to work alone until the malfunctioning cylinder can be replaced. A main cause of failure in the system is the loss of brake fluid and contamination.