The Genuine VW/Audi PCV Emissions Service Kit - 178545 is a comprehensive kit designed for maintaining the PCV (Positive Crankcase Ventilation) system in Volkswagen and Audi vehicles. The kit includes various components that are essential for reducing harmful emissions and ensuring the efficient functioning of the PCV system.

The contents of the kit include a PCV valve, PCV grommet, PCV hose, PCV diaphragm, PCV filter, and PCV breather hose. These components work together to regulate the pressure in the engine crankcase and prevent the buildup of harmful gases.

The PCV valve is responsible for controlling the flow of gases between the crankcase and the intake system, while the grommet seals the valve to prevent any leaks. The PCV hose connects the valve to the intake manifold, allowing the gases to be recirculated and burned in the engine.

The PCV diaphragm is a crucial component that helps regulate the flow of gases and prevent any backflow. The PCV filter traps any oil or debris that may be present in the gases before they are recirculated. Lastly, the PCV breather hose allows fresh air to enter the crankcase and helps maintain proper pressure levels.

Overall, the Genuine VW/Audi PCV Emissions Service Kit - 178545 is a necessary kit for maintaining the PCV system in Volkswagen and Audi vehicles and ensuring they meet emission standards. It is a reliable and high-quality product that helps keep the engine running smoothly and efficiently.