Dorman 911-989 Secondary Air Injection Check Valve - Right

Reliable Secondary Air Injection Check Valve for Audi and Volkswagen

The Dorman 911-989 Secondary Air Injection Check Valve is engineered to maintain optimal emission control in select Audi and Volkswagen models. Crafted from durable cast aluminum, this valve ensures consistent performance within the air injection system.

• Constructed from cast aluminum for durability and corrosion resistance
• Measures 4.5 inches in length with a natural finish
• Features a diaphragm valve type for reliable operation
• Includes 3 ports with inlet size of 0.563 inches and outlet size of 0.5 inches
• Maximum pressure rating of 5 psi suitable for emission control systems
• Operating temperature range from -40°C to 125°C for varied conditions
• Comes with one secondary air injection check valve and one gasket for installation
• Thread diameter and mounting hole diameter both 6 mm for secure fitment

Detailed Product Description

The Dorman 911-989 secondary air injection check valve is designed specifically for emission control systems in Audi and Volkswagen vehicles, including models such as the A4, A6, A7, A8, Q5, Q7, S4, S5, S6, SQ5, and Touareg. Its cast aluminum construction provides strength and resistance to corrosion, ensuring long-term reliability. The diaphragm valve type allows for precise control of air flow, preventing backflow and maintaining system efficiency. With a maximum pressure rating of 5 psi and an operating temperature range from -40°C to 125°C, this valve performs well under various engine conditions. The included gasket ensures a proper seal during installation, reducing the risk of leaks.

Common Applications and Issues Addressed

• Prevents backflow in the secondary air injection system
• Helps reduce harmful emissions by supporting proper air injection
• Resolves check valve failure symptoms such as rough idling or engine warning lights
• Addresses air injection system leaks and pressure loss
• Supports compliance with emission regulations in compatible Audi and Volkswagen models

Installation Notes and Tips

Installation of the Dorman 911-989 secondary air injection check valve requires basic mechanical skills and appropriate tools. Ensure the engine is cool before beginning work. Remove the old valve carefully to avoid damage to surrounding components. Use the included gasket to create a secure seal and prevent leaks. Verify that the thread diameter and mounting hole diameter match the vehicle specifications. After installation, check for proper operation and absence of air leaks in the system.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 911-989 secondary air injection check valve undergoes rigorous quality control to ensure fit and function. This part is backed by Dorman's limited warranty, covering defects in material and workmanship under normal use.