The secondary air injection pump injects fresh air into the exhaust stream to further burn off exhaust gas, aiding catalytic converter warm-up. This Pierburg pump is a direct replacement for the original part, restoring emissions performance for Audi A8 and S8 models with the 4.2L V8 engine from 2000 to 2003.
Key Features & Benefits
- OEM Replacement: Direct fit for Audi A8 and S8 with 4.2L V8 (2000-2003).
- Restores Performance: Replace a failing pump to improve fuel efficiency and reduce emissions.
- Pierburg Quality: Manufactured by a trusted OE supplier.
Vehicle Fitment
| Make | Model | Years | Engine |
|---|---|---|---|
| Audi | S8 | 2001–2003 | 4.2V8 |
| Audi | A8 Quattro | 2000–2003 | 4.2V8 |
Technical Specifications
| Part Number | 721851320 |
Installation Notes
Professional installation recommended; simple bolt-on replacement.
About PIERBURG
Pierburg is a leading OEM manufacturer of emission control components.
This part also goes by the following cross reference.
Cross Reference Part Number:
Fits These Vehicles
| Make | Model | Engine | Years |
|---|---|---|---|
| Audi | A8 Quattro | 4.2V8 | 2000–2003 |
| Make | Model | Engine | Years |
|---|---|---|---|
| Audi | S8 | 4.2V8 | 2001–2003 |