This listing is for Mercedes Benz right cylinder head breather PCV plate A2720100631 280 350 M272
Only for M272 V6 petrol engine 2006-2017 W204 W211 W203 W209 W171 W164 W251 W219 W218

An engine ventilation valve, also known as a PCV (Positive Crankcase Ventilation) valve, plays a crucial role in the functioning of a car's engine. It is a small component that is typically connected to the engine's valve cover or intake manifold.

The main purpose of the engine ventilation valve is to regulate the flow of gases between the engine's crankcase and the intake manifold. It ensures the removal of harmful vapors and gases, such as blow-by gases and unburned fuel, from the engine's crankcase. By preventing the build-up of pressure within the crankcase, the ventilation valve helps maintain a healthy engine performance and prevents potential damage.