System Operation: J64:
WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Mechanical output force is applied from the hydraulic brake caliper 4 pistons, two pistons on each side of the caliper. They are connected hydraulically by a brake pipe. The hydraulic pressure press the brake pads outwards. The brake pads apply the output force to the friction surface on both sides of the rotors, which slows the rotation of tire and wheel assemblies. The correct function of both the brake pad and brake caliper hardware is essential for even distribution of braking force.