The PCV 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 or a decrease in performance with a rough idle, this valve might to be blame. This valve sits on the intake hose for the turbo inlet.
Brand: TOPRAN
Product Nr: 114 736
Compatible with OEM numbers;
06A 129 101A
06A 129 101D
06A 129 101A
06A 129 101D
06A 129 101A
06A 129 101D
06A 129 101A
06A 129 101D