Dorman 911-973 Secondary Air Injection Check Valve - Right

Reliable Secondary Air Injection Check Valve for Audi Models

The Dorman 911-973 Secondary Air Injection Check Valve is engineered to maintain proper air flow within the emission control system of select Audi vehicles. Designed for durability and precise fitment, this valve supports the efficient operation of the air injection system in Audi A6 Quattro, Allroad Quattro, RS4, and S4 models.

• Constructed from a combination of aluminum, brass, and plastic materials for strength and corrosion resistance
• Grey finish complements engine bay components
• Inlet and outlet sizes of 0.675 inches ensure compatibility with OEM air injection hoses
• Diaphragm valve type designed for reliable one-way air flow
• Maximum pressure rating of 50 psi suitable for secondary air injection system demands
• Operates effectively within a temperature range of -40°C to 125°C
• Includes one secondary air injection check valve per package

Product Details and Specifications

The Dorman 911-973 features a diaphragm valve mechanism that prevents exhaust gases from flowing back into the secondary air injection system. Its mixed-material construction combines aluminum and brass components with durable plastic, providing a balance of lightweight design and resistance to heat and corrosion. The grey finish offers a neutral appearance that integrates well with the engine compartment. Both the inlet and outlet ports measure 0.675 inches, matching the specifications required for proper installation on compatible Audi models. This valve is rated to handle pressures up to 50 psi and functions reliably across a wide temperature range from -40°C to 125°C, ensuring consistent performance under various operating conditions.

Compatible Audi Models and Applications

This secondary air injection check valve is compatible with the following Audi vehicles:

• Audi A6 Quattro
• Audi Allroad Quattro
• Audi RS4
• Audi S4

It is designed to replace the original valve in the emission control system, helping maintain proper air flow and reduce harmful emissions.

Common Issues Addressed by the Secondary Air Injection Check Valve

• Prevents backflow of exhaust gases into the air injection system
• Helps reduce engine misfires caused by faulty air injection valves
• Supports proper operation of the emission control system to meet regulatory standards
• Eliminates check engine light triggers related to secondary air injection faults
• Maintains optimal air flow for improved engine performance and emissions

Installation Notes and Tips

When installing the Dorman 911-973 check valve, ensure the valve orientation matches the airflow direction specified by the vehicle manufacturer. Inspect connecting hoses for wear or damage and replace if necessary to prevent leaks. Use appropriate tools to avoid damaging the valve or surrounding components during installation. It is recommended to verify the valve’s pressure rating and temperature range compatibility with the vehicle’s operating conditions before installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 911-973 secondary air injection check valve undergoes rigorous quality control to ensure durability and reliable performance. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship under normal use.