honda odyssey disc brake caliper

The disc brake caliper is the hydraulic clamp that squeezes the brake pads against the rotor to generate braking force. It houses one or more pistons that extend outward when brake pressure is applied and retract when the pedal is released. The caliper is exposed to extreme heat cycles, moisture, and road contamination over its service life. A caliper that fails to clamp fully reduces stopping power, while one that fails to release causes the brake to drag, generating excess heat and accelerating pad and rotor wear.