The brake master cylinder, also known as the brake master cylinder, is an important component of the automotive brake system. It is used to provide brake fluid and distribute it to each tire through the brake cylinder to achieve vehicle braking. In addition, the brake master cylinder can also sense the position of the brake pedal and light up the brake lights. Unlike the clutch, the brake master cylinder has a quarter oil outlet pipe. Overall, the brake master cylinder is one of the key components to ensure safe driving of vehicles.