Brake Caliper: Description and Operation

The front disc brake caliper has dual pistons in an aluminum housing which is suspended on the brake pads.

The rear disc brake caliper has a single piston in an aluminum housing which is suspended in the mounting bracket on two guide pins.

Hydraulic pressure created by applying force to the brake pedal acts equally against the pistons and the bottom of the caliper piston bores to move the pistons outward and to slide the caliper inward, resulting in a clamping action on the brake rotor. This clamping action forces the brake pads against the brake rotor, creating friction to stop the vehicle.