Gates EMH906 Engine Crankcase Vent Valve - PCV Valve

Gates EMH906 Crankcase Vent Valve Overview

The Gates EMH906 crankcase vent valve is an OE-exact PCV valve built for direct replacement in select Audi and Volkswagen applications. It uses a plastic housing with 19 mm and 23 mm inside diameters and two hose connectors for a precise service fit.

For Audi A3, A4, TT, TTS Quattro, and Volkswagen GTI, Eos, and Passat models, this crankcase ventilation pressure regulator helps restore proper emission system operation when the original valve is worn or restricted. The Gates EMH906 is part of the Gates Crankcase Vent Valve line, focused on exact-fit replacement parts for emission control service.

Key Features

• OE-exact crankcase vent valve / PCV valve replacement
• Plastic construction for direct-fit service applications
• Two hose connectors for the listed crankcase ventilation layouts
• Inside diameters: 19 mm (.767 in) and 23 mm (.887 in)
• Built for select Audi and Volkswagen crankcase ventilation systems
• Part number: EMH906

Detailed Product Description

Gates EMH906 is an engine crankcase vent valve for emission control service on select turbocharged and naturally aspirated Audi and Volkswagen vehicles. It is engineered as an OE-style replacement to match the original connection sizes and restore crankcase ventilation pressure regulation. This part cross-references Audi/VW OE numbers 06F129101E and 06F129101G for the same application.

Compatible With 2005-2006 Audi A4, PCV Valve; 2005-2006 Audi A4 Quattro, PCV Valve; 2006 Audi A3, PCV Valve; 2006 Audi A3 Quattro, PCV Valve; 2007 Audi A3 Quattro, PCV Valve; 2007-2009 Audi A4, PCV Valve; 2007-2009 Audi A4 Quattro, PCV Valve; 2007-2008 Audi TT, PCV Valve; 2007-2008 Audi A3, PCV Valve; 2009-2015 Audi TTS Quattro, PCV Valve; 2012-2013 Audi TT Quattro, PCV Valve; 2006-2008 Volkswagen GTI, PCV Valve; 2007-2008 Volkswagen Eos, PCV Valve; 2007-2008 Volkswagen Passat, PCV Valve.

What It Helps Address

• Crankcase pressure regulation problems
• Oil vapor separation and ventilation flow issues
• Rough idle caused by a failing PCV valve
• Vacuum leaks related to a worn crankcase vent valve
• Emission system performance loss from restricted ventilation

Installation Notes and Tips

Verify the original valve connection sizes before installation and match the 19 mm and 23 mm hose interfaces to the vehicle’s existing plumbing. Confirm the vehicle’s year, model, and chassis or production notes where listed, especially for 2005-2006 Audi A4/A4 Quattro and 2006 Audi A3/A3 Quattro applications. The EMH906 is a direct replacement part, so installation should follow the factory crankcase ventilation routing.

Quality Assurance

Gates markets this crankcase ventilation line as OE-exact replacement hardware for restoring emission ventilation system operation and service life. The EMH906 is built to the stated fitment and connection specifications for consistent replacement on the listed Audi and Volkswagen models.