Genuine OEM Volkswagen Engine Oil Pump Chain, part number 077115125B. This critical engine component transmits power to the engine oil pump, ensuring a consistent supply of lubricating oil to all moving parts. It is a durable metal roller chain, weighing approximately 0.26 kg. Using a genuine OEM chain guarantees the correct material strength, link dimensions, and wear resistance, which are essential for reliable oil pump operation and preventing catastrophic engine failure.