Genuine OEM Volkswagen Haldex Oil Drain Screw, part number 02D525729. This specialized screw is a critical component for the maintenance of the Haldex all-wheel-drive system, allowing for the controlled draining of oil during service. It is installed within the Haldex unit. Made from durable metal and finished in grey, this screw ensures a leak-free seal and reliable operation. Weighing only 0.008 kg, its precise threading and robust construction are vital. Using a genuine OEM drain screw guarantees the correct thread pitch, sealing surface, and material strength to prevent leaks and ensure the integrity of the Haldex system.