2008-2023 Audi R8/RS7/S6/S7 Secondary Air Pump Filter 420906321
OEM Part #: 420-906-321 (420906321)
Actual photo
The exact part you’ll receive — not a stock photo.
$21.49
Used
Donor2012 Audi R8 · 4.2L · 41k miles
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Genuine OEM Used
SKU: 570706
Donor Vehicle: 2012 Audi R8 · 4.2L · 41k miles
2 photos
$21.49
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Genuine OEM Used
SKU: 526716
Donor Vehicle: 2013 Audi S6 · 4.0L · 78k miles
2 photos
$21.49
30-Day Returns
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Used OEM Audi secondary air pump filter, part number 420906321. This is the genuine air intake filter for the secondary air injection system, which helps reduce cold-start emissions by supplying extra oxygen to the exhaust. A clogged or failed filter can trigger a check-engine light or a P0491/P0492 code. It fits Audi R8, RS7, S6, and S7 models equipped with the 4.0L V8, 4.2L V8, or 5.2L V10 engines.
Specifications
| Fits Vehicle Model | R8, RS7, S6, S7 |
| Fits Vehicle Make | Audi |
| OEM Part No | 420-906-321 (420906321) |
| Category | Fuel / Emissions |
Compatible Vehicles
Fits 52 vehicle configurations across 1 make, 2008-2023.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 52 vehicle configurations — 24 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2018 | Audi | S7 | Hatchback | 4.0L V8 Turbo | |
| 2022 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2022 | Audi | R8 | Coupe | 5.2L V10 | |
| 2021 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2020 | Audi | R8 | Coupe | 5.2L V10 | |
| 2018 | Audi | R8 | Coupe | 5.2L V10 | |
| 2020 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2018 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2018 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2018 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CRDB, CWUB |
| 2021 | Audi | R8 | Coupe | 5.2L V10 | |
| 2023 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2023 | Audi | R8 | Coupe | 5.2L V10 | |
| 2023 | Audi | R8 | Convertible | 5.2L V10 | |
| 2017 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2015 | Audi | R8 | Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) CTPA, CTYA |
| 2015 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) CTPA, CTYA |
| 2015 | Audi | R8 | Coupe | 4.2L V8 | |
| 2015 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CRDB, CWUB |
| 2014 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CRDB, CWUB |
| 2014 | Audi | R8 | Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) CTPA, CTYA |
| 2014 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) CTPA, CTYA |
| 2014 | Audi | S7 | Hatchback | 4.0L V8 Turbo | |
| 2015 | Audi | R8 | Spyder Convertible | 4.2L V8 | |
| 2014 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | R8 | Spyder Convertible | 4.2L V8 | |
| 2014 | Audi | R8 | Coupe | 4.2L V8 | |
| 2013 | Audi | S7 | Hatchback | 4.0L V8 Turbo | |
| 2012 | Audi | R8 | Spyder Convertible | 4.2L V8 | For Vehicles with Engine Code(s) CNDA |
| 2012 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) CNDA |
| 2011 | Audi | R8 | Spyder Convertible | 4.2L V8 | For Vehicles with Engine Code(s) CNDA |
| 2011 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) CNDA |
| 2010 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) CNDA |
| 2009 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) CNDA |
| 2008 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) CNDA |
| 2013 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2016 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2011 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2010 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | GT Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2009 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | GT Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2011 | Audi | R8 | Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2017 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2017 | Audi | S7 | Hatchback | 4.0L V8 Turbo | |
| 2016 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CRDB, CWUB |
| 2017 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CRDB, CWUB |
| 2017 | Audi | R8 | Coupe | 5.2L V10 | |
| 2016 | Audi | S7 | Hatchback | 4.0L V8 Turbo |