Genuine OEM Audi Engine Camshaft Adjuster Unit, part number 079109087N. This critical component is responsible for precisely adjusting the camshaft timing, which optimizes valve lift and duration for improved engine performance, fuel efficiency, and emissions. It is typically mounted on the end of the camshaft. Constructed from robust metal alloys with a gear-like design, it weighs approximately 0.93 kg. Choosing a genuine OEM camshaft adjuster ensures the correct hydraulic and mechanical tolerances, vital for accurate variable valve timing operation and preventing engine issues.