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Brake pads are a crucial component of automotive hydraulic brake systems, responsible for generating the friction needed to stop a vehicle. They are typically composed of a steel backing plate with a high-friction material bonded to it, such as ceramic, semi-metallic, or organic materials. When the brake pedal is pressed, hydraulic pressure forces the brake pads against the brake rotor, creating friction and stopping the vehicle's wheels from turning. Over time, brake pads wear down and must be replaced to ensure safe and effective braking performance. In the hierarchy of automotive systems, brake pads are a key component of automotive brakes, which in turn are a critical part of automotive hydraulic brake systems.