Genuine OEM Citroen Dynamic Belt Tensioner, part number 1616876780. This component is crucial for maintaining the correct tension on the engine's accessory drive belts, ensuring efficient operation of connected systems like the alternator and power steering pump. It is an integral part of the engine's belt drive system. Weighing approximately 0.793 kg, this tensioner features a robust metal housing and a durable pulley. Choosing a genuine OEM tensioner ensures factory-specified tensioning force, precise alignment, and material quality, which are critical for preventing premature belt wear and system failure.