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Brake pads are a crucial component of automotive foundation brakes, which are themselves a part of automotive brake systems. They are responsible for creating the friction necessary to stop the vehicle when the brake pedal is applied. Brake pads are typically made of a metal backing plate with a high-friction material bonded to it. This material can be composed of various substances, such as ceramics, metals, or organic compounds. The friction material wears down over time and will eventually need to be replaced. Brake pads are designed to wear out gradually, providing an audible warning in the form of a squealing noise when they reach the end of their useful life. This feature allows drivers to replace them before they cause damage to other brake components. In summary, brake pads play a critical role in stopping vehicles and are a key component of automotive foundation brakes, which are part of the larger automotive brake system.