A serpentine belt is a long, continuous belt used in vehicles to drive multiple peripheral devices from the engine's crankshaft. It typically powers components such as the alternator, power steering pump, water pump, and air conditioning compressor. This design allows for a more efficient transfer of power and reduces the number of belts needed in the engine compartment. Made from durable rubber and reinforced with fibers, the serpentine belt is designed to withstand high temperatures and friction. Regular inspection and maintenance are essential, as a worn or damaged belt can lead to engine performance issues or failure of the connected components.