Gates EMH904 Engine Crankcase Vent Valve

Gates EMH904 Crankcase Vent Valve

The Gates EMH904 is an OE-exact crankcase vent valve built for precise fitment and straightforward installation. It restores crankcase ventilation performance by regulating pressure in the emission control system and is built with plastic, rubber, and steel construction for the specified application.

Compatible with 2002-2005 Audi A4, 2002-2005 Audi A4 Quattro, and 2002 Volkswagen Golf, this Gates crankcase vent valve supports direct replacement service for common crankcase ventilation repairs. The EMH904 part number is also referenced for TechSmart G16001 and URO 06A129101D applications.

Key Features

• OE-exact crankcase ventilation pressure regulator design
• Direct-fit replacement for the specified Audi and Volkswagen applications
• Plastic, rubber, and steel construction
• Two hose connectors with 17 mm inside diameter at each connection
• Supplied as a PCV valve for crankcase ventilation service
• Gates EMH904 part number for easy catalog matching

Product Details

Gates EMH904 is part of the Gates Crankcase Vent Valve line, a product line focused on OE-style crankcase ventilation components including PCV valves, pressure regulators, and oil separators. This valve is engineered to match the original fit and connection sizing for the listed vehicles, helping restore proper emission ventilation system operation and maintain consistent crankcase pressure control. For buyers searching for a 2002-2005 Audi A4 PCV valve kit, 2002-2005 Audi A4 Quattro crankcase vent valve, or a 2002 Volkswagen Golf engine crankcase vent valve kit, EMH904 is the direct-reference part number to verify.

Common Issues This Part Addresses

• Excess crankcase pressure
• Rough idle related to ventilation system faults
• Oil vapor control problems in the emission ventilation system
• Vacuum leaks caused by a worn PCV valve
• Check engine light concerns tied to crankcase ventilation faults

Installation Notes and Tips

Verify the valve style, hose connector count, and 17 mm inside diameter before installation. Confirm the vehicle application by year, make, and model, especially on 2002-2005 Audi A4 and Audi A4 Quattro models and 2002 Volkswagen Golf applications. Inspect connected hoses and surrounding ventilation components for wear or cracking during replacement to help ensure a proper seal and stable operation.

Quality Assurance

Gates manufactures this crankcase vent valve as an OE-exact replacement intended to restore the emission ventilation system to proper operating levels. The EMH904 is built to match the specified application requirements for fit and function.