Brake fluid is critical for stopping your car. The brake system is a high-pressure hydraulic system that includes significant enhancements to produce ample force to stop a moving automobile.
When the brake pedal is pressed, the fluid in the brake master cylinder is forced to the pistons in each brake caliper and wheel cylinder.
The purpose is to create greater pressure in the system and drive the fluid ahead, causing the brake pads on the wheel to compress against the rotors.
A car that has little or no brake fluid should not be driven, as the braking system would not function properly without it. The brake fluid should be changed approximately every 30,000 miles, or whenever the brake system is serviced.
To guarantee the complete removal of moisture from the brake system and new fluid that assures optimal hydraulic pressures, have a brake fluid change performed by a professional.