Genuine OEM Hyundai Belt Tensioner Assembly, part number 252802G100. This essential engine component is responsible for maintaining the correct tension on the serpentine or accessory drive belt, which powers various engine accessories like the alternator, power steering pump, and air conditioning compressor. Proper belt tension is crucial for the efficient and quiet operation of these systems, preventing belt slippage or excessive wear. Weighing approximately 1.02 kg, this assembly is designed for precise fitment within the engine bay. Opting for a genuine OEM belt tensioner ensures factory-specified tension, durability, and smooth operation, preventing premature belt failure and potential damage to engine components.