This part acts as a PCV valve, as it provides a one way exit for gasses built up in the crankcase. Over time, contamination might cause reduced air flow and cracks can occur in the housing. If your car is experiencing a loss of boost pressure, a decrease in performance, as well as rough idle, this valve might to be blame. This valve is located on the intake hose leading to the turbo inlet.
This Part Fits the Following Vehicles