Brake hydraulics refers to the system in a vehicle that uses hydraulic fluid to transmit force from the brake pedal to the brake components, ultimately causing the vehicle to slow down or come to a stop. This system is a fundamental part of the overall brake system, and it is essential for the safe and effective operation of a vehicle. Regular inspection and maintenance of brake hydraulics, including checking for leaks, ensuring proper fluid levels, and replacing old brake fluid, are essential for the reliable and safe operation of a vehicle's braking system.