What is the primary role of the brake system in a vehicle?

The primary role of the brake system in a vehicle is to apply friction to stop the rotation of the wheels. This is achieved through various components, such as the brake pads, rotors, and calipers. When the driver presses the brake pedal, hydraulic fluid causes the brake pads to clamp onto the rotors, creating friction. This friction slows down and eventually stops the wheels from rotating, allowing the vehicle to come to a safe halt.

Understanding this function is vital for safe vehicle operation and maintenance. Instead of influencing fuel consumption, vehicle speed, or engine performance, the brake system's sole purpose focuses on decelerating and stopping the vehicle effectively. Thus, it plays a crucial role in safety and control while driving.