Genuine OEM Hyundai Belt Tensioner Assembly, part number 252812A600. This essential component is responsible for maintaining the correct tension on the engine's serpentine or drive belt, preventing slippage and ensuring the efficient operation of accessories like the alternator, power steering pump, and air conditioning compressor. It is located within the engine bay, part of the accessory drive system. The assembly weighs approximately 1.49 kg and measures 20 cm in length. Opting for a genuine OEM tensioner ensures precise spring calibration, durable bearing quality, and correct mounting geometry for reliable, vibration-free operation and extended service life.