Genuine OEM Hyundai Belt Tensioner Assembly, part number 252802G506. This crucial assembly is responsible for maintaining the correct tension on the engine's serpentine or accessory drive belt. Proper belt tension is vital for the efficient and reliable operation of components such as the alternator, power steering pump, and air conditioning compressor. The assembly includes the tensioner mechanism and pulleys, designed for specific mounting within the engine bay. Choosing a genuine OEM tensioner assembly guarantees the correct spring force, bearing quality, and structural integrity for optimal belt life and accessory function.