Dorman 911-139 Secondary Air Injection Check Valve

Reliable Secondary Air Injection Check Valve for Volkswagen Vehicles

The Dorman 911-139 Secondary Air Injection Check Valve is engineered to maintain optimal emission control in select Volkswagen models. Crafted from durable cast aluminum, this check valve ensures consistent performance within the air injection system, helping your Beetle, Golf, Jetta, or Passat meet emission standards effectively.

• Constructed from cast aluminum for durability and corrosion resistance
• Measures 9.5 inches in length with a natural finish
• Features two ports: 0.886 inch inlet and 0.535 inch outlet sizes
• Solenoid valve type designed for reliable operation under pressure up to 5 psi
• Operates efficiently within a temperature range of -40°C to 125°C
• Includes mounting hole diameter of 0.25 inches for secure installation
• Package contains one check valve and two gaskets for a complete replacement

Durable Design and Precise Fit for Volkswagen Emission Systems

The Dorman 911-139 check valve is specifically designed for Volkswagen air injection systems, compatible with models such as the Beetle, Beetle Cabrio, Golf, Golf SportWagen, Jetta, and Passat. Its cast aluminum construction provides strength and resistance to heat and corrosion, essential for the demanding environment of emission control components. The valve’s solenoid design ensures precise control of air flow, preventing backflow and maintaining system integrity. With inlet and outlet sizes tailored to OEM specifications, this valve integrates seamlessly into your vehicle’s secondary air injection system.

Common Applications and Problem Resolution

• Prevents exhaust gas backflow that can damage the air injection system
• Helps reduce emissions by ensuring proper air injection during cold starts
• Addresses check valve failure symptoms such as engine warning lights or failed emissions tests
• Eliminates air leaks that can cause rough idling or poor engine performance
• Replaces worn or damaged valves to restore system functionality

Installation Notes and Tips

Installation of the Dorman 911-139 check valve requires basic mechanical skills and appropriate tools. Ensure the engine is cool before beginning work. Remove the old valve carefully to avoid damaging surrounding components. Use the included gaskets to create a proper seal and prevent leaks. Verify the mounting hole diameter of 0.25 inches matches your vehicle’s bracket or mounting point. After installation, inspect for leaks and test the air injection system to confirm proper operation.

Quality Assurance and Warranty Information

Dorman manufactures the 911-139 Secondary Air Injection Check Valve to meet or exceed OEM standards for fit, form, and function. The cast aluminum material and solenoid valve design contribute to long-lasting durability under typical operating conditions. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship for a specified period. Always refer to the warranty documentation for detailed terms and conditions.