Genuine OEM Volkswagen Timing Belt Gear, part number 0XW130639A. This gear engages with the timing belt to drive camshafts or other engine components. It is located within the engine assembly. The gear is made of durable metal for long service life. Genuine OEM timing gears are manufactured to exact tolerances to ensure proper meshing with the timing belt and other components, preventing premature wear and ensuring accurate engine timing.