Dorman 306-023 Secondary Air Injection Pump

Overview of the Dorman Secondary Air Injection Pump

The Dorman 306-023 Secondary Air Injection Pump is designed for select Mercedes-Benz models, including the C32 AMG, E55 AMG, and ML350. This air pump plays a critical role in the emission control system by reducing harmful exhaust emissions during cold starts.

• Compatible with multiple Mercedes-Benz models such as C240, CLK500, and SL500
• Includes 1 air pump unit; pulley and mounting hardware not included
• Part number 306-023 ensures precise fitment and reliable performance
• Supports the vehicle’s air injection system to meet emission standards

Product Details and Attributes

The Dorman 306-023 Secondary Air Injection Pump is engineered to replace the original equipment pump in Mercedes-Benz vehicles like the CLS500 and G55 AMG. This unit comes as a single air pump without the pulley or mounting hardware, so those components must be reused from the original assembly or purchased separately. The pump is designed to integrate seamlessly with the vehicle’s emission control system, helping to inject fresh air into the exhaust stream to reduce pollutants during engine warm-up.

Compatible Mercedes-Benz Models

This secondary air injection pump is compatible with a wide range of Mercedes-Benz vehicles, including but not limited to:

• C32 AMG, C240, C280, C320
• CL55 AMG, CL500
• CLK55 AMG, CLK320, CLK430, CLK500
• CLS55 AMG, CLS500
• E55 AMG, E320, E430, E500
• G55 AMG, G500
• ML55 AMG, ML320, ML350, ML430, ML500
• R500, S55 AMG, S350, S430, S500
• SL500, SLK320

Common Applications and Issues Addressed

• Restores proper function of the secondary air injection system
• Helps reduce cold start emissions and exhaust smoke
• Eliminates air pump failure symptoms such as check engine light or rough idle
• Prevents damage to catalytic converters caused by insufficient air injection
• Supports compliance with emission regulations for Mercedes-Benz vehicles

Installation Notes and Tips

When installing the Dorman 306-023 air pump, note that the pulley and mounting hardware are not included. It is recommended to inspect and reuse the original pulley and hardware or source replacements separately. Proper electrical connections and vacuum lines should be checked to ensure full functionality. Installation should be performed by a qualified technician familiar with Mercedes-Benz emission systems.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 306-023 Secondary Air Injection Pump undergoes rigorous quality control to ensure durability and reliable operation. Warranty coverage details can be obtained from the product documentation or supplier, providing assurance for professional buyers and repair facilities.