PCV Valve, Compatible with Merc W204, W211

The PCV (Positive Crankcase Ventilation) valve in a

Mercedes-Benz W204 CDI

• Often referred to by Mercedes as a crankcase rebreather or oil separator
• Is a critical maintenance component that regulates crankcase pressure.

A failing PCV valve can cause several performance and mechanical issues:

Oil Leaks and Smoke: A clogged valve causes pressure buildup, forcing oil past gaskets and onto the exhaust, leading to burning smells or smoke.
Poor Engine Performance: Symptoms include rough idling, stalling at stops, or a whistling/hissing sound caused by vacuum leaks.
Increased Consumption: A valve stuck open can draw excessive oil into the intake, leading to higher oil consumption and potentially clogging intake manifold flaps with soot.
OM651, OM652

What's in the box
1 x Housing
1 x Spring
1 x Diaphragm