Genuine OEM Hyundai Belt Tensioner Dust Cap, part number 252852G000. This small but important cap is designed to protect the belt tensioner mechanism from ingress of dirt, dust, and other road debris. It is fitted directly onto the belt tensioner pulley. Using a genuine OEM dust cap ensures a precise fit and durable material, effectively shielding critical moving parts and contributing to the longevity of the accessory drive system.