Brake fluid is a hydraulic liquid responsible for moving various braking system components. It works under high pressure and temperatures to ensure your vehicle stops. The stop-action happens once you exact pressure on the brake pedal. The fluid is a non-compressible liquid that lies within brake lines to deliver pressure from the brake pedal. Each of the brake rotors on each wheel gets the force causing an ultimate slow down or stop.
Here is how brake fluid works
Once you exact pressure to the brake pedal, the pedal pushes a piston inside the brake caliper. It causes compression that increases pressure inside the brake lines. Pressure inserted will move brake fluid, causing the rotors to squeeze on brake pads. They make direct contact with the wheels making your vehicle slow down or stop. Brake fluid will come in a variety. Thus, it would be best if you were cautious when selecting for replacement.