Hella 7.04389.00.0 Secondary Air Injection Pump

The Hella 7.04389.00.0 Secondary Air Injection Pump is an electric pump designed to reduce harmful emissions during engine cold start and warm-up phases. This active system component blows fresh air into the exhaust stream to ensure sufficient oxygen for the secondary reaction that converts unburned hydrocarbons (HC) and carbon monoxide (CO) into carbon dioxide and water vapor.

Key Features:

• OEM-quality replacement part manufactured to meet or exceed original equipment specifications
• Electric pump design provides reliable, consistent airflow to the exhaust system
• Helps catalytic converter reach optimal operating temperature more quickly
• Reduces cold-start emissions for improved environmental compliance
• Compact, lightweight construction for straightforward installation
• Engineered for durability and long service life

The secondary air injection system accelerates catalytic converter warm-up through the heat generated in the secondary combustion reaction. Manufactured by Pierburg and distributed by Hella, this pump represents over 120 years of automotive expertise from a world-leading OEM supplier. Proper function of the secondary air injection system is critical for maintaining emissions compliance and preventing check engine light illumination due to system faults.