Pierburg 7.03635.46.0 Secondary Air Injection Pump

Pierburg Secondary Air Injection Pump

Pierburg Secondary Air Injection Pump 7.03635.46.0 is a 12V electric standard replacement for emission control systems that inject fresh air into the exhaust during cold starts. It helps reduce startup emissions while maintaining smooth engine operation on supported Audi applications.

Built as Genuine OE from HELLA, this pump follows OE-level specifications for direct replacement service on select Audi A6 Quattro, A7 Sportback, Q5, Q7, Q8, S6, S6 allroad, and SQ5 applications. The Pierburg 7.03635.46.0 is a practical choice when the original secondary air pump has failed or is no longer moving air correctly.

Key Features

• 12V electric operating mode
• Standard replacement grade for emission control service
• Secondary air injection pump for cold-start exhaust air delivery
• Genuine OE from HELLA product line
• Direct-fit application coverage for select Audi models
• Cross-reference: 06L 959 231 B, 06L959231

Product Details

This Pierburg secondary air injection pump is used in the vehicle’s emission control system to push fresh air into the exhaust stream during cold starts. That added oxygen helps the engine management system reduce cold-start emissions and supports proper exhaust aftertreatment operation. The 12V electric design and OE-style construction make the 7.03635.46.0 a straightforward replacement for the original unit on listed Audi vehicles.

Compatible With 2019-2023 Audi A6 Quattro, N/A; 2021-2023 Audi A7 Sportback, N/A; 2021 Audi Q5, N/A from VIN # H000001; 2020 Audi A6 allroad, N/A; 2018-2020 Audi Q5, N/A; 2020 Audi Q5 PHEV, N/A; 2020 Audi Q7, N/A; 2016 Audi Q7, N/A; 2019-2020 Audi Q8, N/A; 2020 Audi S6, N/A; 2018-2020 Audi SQ5, N/A; 2017-2019 Audi Q7, N/A with OE No. 06L959231; 2017 Audi Q5, N/A with OE No. 06L959231; 2017 Audi SQ5, N/A with OE No. 06L959231.

Common Issues This Part Addresses

• Secondary air pump failure codes
• Reduced fresh-air injection during cold starts
• Higher-than-normal cold-start emissions
• Noise or weak operation from the original pump
• Emission system faults tied to the secondary air circuit

Installation Notes and Tips

Verify the OE number and vehicle application before ordering, especially on 2017-2021 Audi models with VIN-specific or OE-number-specific coverage. Confirm the electrical connection and 12V system requirements match the original unit. Because this part serves the emission control system, proper diagnosis of related valves, hoses, and control components should be completed before installation.

Quality Assurance

Pierburg is supplied as Genuine OE from HELLA, giving this replacement pump OE-level application coverage and construction for the listed Audi fitments. Part number 7.03635.46.0 is engineered for direct replacement service in supported secondary air injection applications.