Pierburg 7.04389.08.0 Secondary Air Injection Pump

Pierburg Secondary Air Injection Pump

Pierburg Secondary Air Injection Pump 7.04389.08.0 is a 12V electric standard replacement for emission control systems that inject fresh air into the exhaust during cold starts. It supports cleaner startup operation and OE-level fitment for select Mercedes-Benz applications, including Mercedes-Benz Maybach S650 and Mercedes-Benz S65 AMG.

Key Features

• Standard replacement secondary air injection pump
• Electric operating mode with 12 VDC power
• Supports fresh-air injection during cold starts
• Built for emission control system service
• Genuine OE from HELLA product line
• Part number: 7.04389.08.0

Product Details

This Pierburg air injection pump is engineered for emission control service where the secondary air system must deliver fresh air into the exhaust stream after startup. By helping the engine reach cleaner cold-start operation, it supports smoother running and reduced exhaust emissions. The Genuine OE from HELLA designation reflects a product line associated with OE-style replacement standards, making this a direct-fit service part for select Mercedes-Benz V12 and AMG applications. Cross-reference part numbers include URO 0001407085 for the same application.

Vehicle Fitment

• Fits 2018-2019 Mercedes-Benz Maybach S650, 12V - Electric; Genuine OE from HELLA
• Fits 2015-2019 Mercedes-Benz S65 AMG, With OE No. A0001407085; Genuine OE from HELLA
• Fits 2018 Mercedes-Benz G65 AMG, With OE No. 0001407085, A0001407085; Genuine OE from HELLA
• Fits 2018 Mercedes-Benz SL65 AMG, With OE No. 0001407085, A0001407085; Genuine OE from HELLA
• Fits 2016-2017 Mercedes-Benz G65 AMG, With OE No. A0001407085; Genuine OE from HELLA
• Fits 2016-2017 Mercedes-Benz Maybach S600, With OE No. A0001407085; Genuine OE from HELLA
• Fits 2015-2017 Mercedes-Benz S600, With OE No. A0001407085; Genuine OE from HELLA
• Fits 2017 Mercedes-Benz S65L AMG, 12V - Electric; Genuine OE from HELLA
• Fits 2013-2017 Mercedes-Benz SL65 AMG, With OE No. A0001407085; Genuine OE from HELLA
• Fits 2015 Mercedes-Benz S63 AMG, With OE No. A0001407085; Genuine OE from HELLA

Common Replacement Symptoms

• Secondary air system fault codes
• Rough cold-start emissions behavior
• Failed or noisy air injection pump operation
• Check engine light related to air injection performance
• Reduced cold-start emissions control effectiveness

Installation Notes

Verify OE number A0001407085 or 0001407085 before ordering, and confirm 12V electric system requirements on the vehicle. Match the pump to the existing secondary air injection layout on the specific Mercedes-Benz application listed above. Professional installation is recommended so the emission control system can be checked for stored faults and proper operation after replacement.

Quality Assurance

Pierburg is supplied here as Genuine OE from HELLA, and this part is built as a standard replacement for emission control service on the listed Mercedes-Benz applications. Part number 7.04389.08.0 is specified for OE-level fitment on the vehicles shown.