Dorman 911-622 Secondary Air Injection Check Valve

Reliable Secondary Air Injection Check Valve for Toyota Vehicles

The Dorman 911-622 Secondary Air Injection Check Valve is engineered to maintain optimal emission control in Toyota Sequoia and Tundra models. Constructed from durable cast aluminum, this valve ensures consistent performance within a wide temperature range.

• Material: Cast aluminum for strength and corrosion resistance
• Color/Finish: Black and silver for durability and visual inspection
• Inlet and Outlet Size: 0.625 inches for precise fitment
• Maximum Pressure Rating: 15 psi to handle typical system pressures
• Valve Type: Reed valve design for reliable one-way airflow
• Working Temperature Range: -40°C to 125°C suitable for various operating conditions
• Package Contents: Includes air check valve, gasket, and secondary mounting bracket for installation

Durable Design and Precise Fitment for Toyota Sequoia and Tundra

The Dorman 911-622 is specifically designed for the secondary air injection system in Toyota Sequoia and Tundra vehicles. Its cast aluminum construction provides durability and resistance to corrosion, while the black and silver finish aids in long-term reliability. The reed valve mechanism ensures proper one-way airflow, preventing exhaust gases from flowing back into the air injection system. With inlet and outlet sizes of 0.625 inches and a maximum pressure rating of 15 psi, this check valve fits precisely and operates effectively under typical emission control system pressures. The included gasket and mounting bracket simplify installation and help maintain a secure, leak-free connection.

Purpose and Common Issues Addressed

• Prevents exhaust gas backflow in the secondary air injection system
• Helps reduce harmful emissions by ensuring proper air injection
• Resolves check valve failure symptoms such as rough idle or failed emissions tests
• Eliminates air injection system leaks that can trigger engine warning lights
• Maintains system pressure to support catalytic converter efficiency

Installation Notes and Tips

• Verify compatibility with Toyota Sequoia and Tundra models before installation
• Use the included gasket and mounting bracket to ensure a secure fit
• Inspect the air injection system for additional wear or damage during replacement
• Follow manufacturer torque specifications to avoid leaks or damage
• Test the system after installation to confirm proper operation

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 911-622 Secondary Air Injection Check Valve undergoes rigorous quality control to ensure durability and reliable performance in Toyota Sequoia and Tundra vehicles. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Consult product documentation for exact warranty terms.