The breather, or also commonly called the PCV or oil separator, allows the crankcase to expel air without losing any oil. This system is designed to give gases a way to escape in a controlled manner from the crankcase.

It is critical that the parts of the PCV system be kept clean and open; otherwise airflow will be insufficient. A plugged or malfunctioning PCV system will eventually damage an engine.


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Fits:
Audi B8 A5 2.0T (2010-2012)

Let me know if you have any questions.

Jason