2008-2018 Audi A4/A5/A8/Q5/RS5/S4/S5/S8 Blower Motor Resistor 8K0820521
OEM Part #: 8K0-820-521 (8K0820521)
Actual photo
The exact part you’ll receive — not a stock photo.
$19.49
Used
Donor2009 Audi A5 · 3.2L
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Genuine OEM Used
SKU: 237876
Donor Vehicle: 2009 Audi A5 · 3.2L
2 photos
$19.49
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Used Audi blower motor resistor, OEM part number 8K0820521. This genuine part also replaces 8K0820521B and 8K0820521C. It controls the fan speed for the HVAC system; when it fails, the blower may stop working or only run on one speed.
Specifications
| Fits Vehicle Model | A4, A5, A8, Q5, RS5, S4, S5, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8K0-820-521 (8K0820521) |
| Compatible OEM Part No | 8K0-820-521-B, 8K0-820-521-C |
| Category | HVAC / Climate Control |
Compatible Vehicles
Fits 81 vehicle configurations across 1 make, 2008-2018.
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 81 vehicle configurations — 25 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2015 | Audi | RS5 | Coupe | 4.2L V8 | |
| 2014 | Audi | RS5 | Coupe | 4.2L V8 | |
| 2013 | Audi | RS5 | Coupe | 4.2L V8 | |
| 2009 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2011 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2011 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2010 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2011 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2012 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2012 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2012 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2012 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2012 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2011 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2010 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2011 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2011 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2010 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2011 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2009 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2010 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2012 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2010 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2012 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Vehicles with Production Date After 03/03/08 |
| 2014 | Audi | A8 | Quattro L Sedan | 3.0L V6 Diesel Turbo | |
| 2014 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2015 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | A8 | Quattro L Sedan | 3.0L V6 Diesel Turbo | |
| 2013 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro L Sedan | 3.0L V6 Supercharged | |
| 2008 | Audi | S5 | Coupe | 4.2L V8 | |
| 2009 | Audi | S5 | Coupe | 4.2L V8 | |
| 2010 | Audi | S5 | Coupe | 4.2L V8 | For Vehicles with Production Date After 03/03/08 |
| 2010 | Audi | S4 | Sedan | 3.0L V6 Supercharged | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2010 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2011 | Audi | S5 | Coupe | 4.2L V8 | For Vehicles with Production Date After 03/03/08 |
| 2011 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2011 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2011 | Audi | S4 | Sedan | 3.0L V6 Supercharged | For Vehicles with Production Date After 03/03/08 |
| 2011 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2014 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2012 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2012 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2012 | Audi | S4 | Sedan | 3.0L V6 Supercharged | For Vehicles with Production Date After 03/03/08 |
| 2012 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2012 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2013 | Audi | A8 | Quattro L Sedan | 3.0L V6 Supercharged | |
| 2013 | Audi | A8 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2013 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2014 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2012 | Audi | S5 | Coupe | 4.2L V8 | For Vehicles with Production Date After 03/03/08 |
| 2015 | Audi | A8 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2015 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2018 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2016 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2009 | Audi | A5 | Quattro Coupe | 3.2L V6 | |
| 2011 | Audi | Q5 | SUV | 3.2L V6 | |
| 2008 | Audi | A5 | Quattro Coupe | 3.2L V6 | |
| 2009 | Audi | A4 | Quattro Sedan | 3.2L V6 | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2009 | Audi | Q5 | SUV | 3.2L V6 | For Vehicles with Production Date Between 05/04/09 and 09/07/09 |
| 2010 | Audi | Q5 | SUV | 3.2L V6 | For Vehicles with Production Date Between 05/04/09 and 09/07/09 |
| 2010 | Audi | A5 | Quattro Coupe | 3.2L V6 | For Vehicles with Production Date After 03/03/08 |
| 2012 | Audi | Q5 | SUV | 3.2L V6 | |
| 2010 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 03/03/08 and 09/07/09 |
| 2015 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | A8 | Quattro L Sedan | 3.0L V6 Supercharged | |
| 2016 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2016 | Audi | A8 | Quattro L Sedan | 3.0L V6 Supercharged | |
| 2016 | Audi | A8 | Quattro L Sedan | 3.0L V6 Diesel Turbo | |
| 2016 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2017 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2017 | Audi | A8 | Quattro L Sedan | 3.0L V6 Supercharged | |
| 2017 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2018 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2018 | Audi | A8 | Quattro L Sedan | 3.0L V6 Supercharged |