Genuine OEM Volkswagen Camshaft Adjuster Unit, part number 0XW109088. This unit adjusts the timing of the camshaft relative to the crankshaft to optimize engine performance and emissions. It is located at position 13 in the diagram. This part weighs 0.672 kg and has dimensions of 0.1m x 0.1m x 0.03m. Genuine OEM camshaft adjusters ensure precise timing control for efficient engine operation and reduced emissions.