Conventional Brake System (Non-Hybrid Vehicles)
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The brake pedal is connected to the vacuum power brake booster, which is connected to the brake master cylinder. When the brake pedal is applied, brake fluid is pushed through the double-walled steel tubes and flexible hoses to the disc brake calipers. The brake fluid enters the disc brake calipers, forcing the caliper pistons and brake pads outward against the brake disc friction surfaces, slowing or stopping wheel rotation. When the brake pedal is released, brake fluid pressure is relieved, returning the disc brake systems to the unapplied position.