2004-2010 Audi A8/S8 Blower Motor Resistor 4E0820521
OEM Part #: 4E0-820-521 (4E0820521)
Actual photo
The exact part you’ll receive — not a stock photo.
$69.49
Used
Donor2005 Audi A8 · 6.0L
✓ Free Same Day Shipping on orders by noon CT
Only 1 in stock — no guaranteed restock
Genuine OEM Used
SKU: 681169
Donor Vehicle: 2005 Audi A8 · 6.0L
3 photos
$69.49
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
- eBay Top Rated · 100,000+ positive ratings
- Ships from our own indoor warehouse
A used OEM Audi blower motor resistor, part number 4E0820521, along with superseded numbers 4E0820521C, 4E0820521B, and 4E0820521A. This component controls fan speed in the HVAC system. When it fails, the blower often works only on high speed or stops entirely—a common issue in these applications. Pulled from a donor vehicle, it’s ready to install.
Specifications
| Fits Vehicle Model | A8, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4E0-820-521 (4E0820521) |
| Compatible OEM Part No | 4E0-820-521-C, 4E0-820-521-B, 4E0-820-521-A |
| Category | HVAC / Climate Control |
Compatible Vehicles
Fits 21 vehicle configurations across 1 make, 2004-2010.
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 21 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2010 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2008 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2010 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2009 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2006 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2007 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2004 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2007 | Audi | S8 | Sedan | 5.2L V10 | |
| 2007 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2005 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2008 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2005 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2008 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2006 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2006 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2007 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2009 | Audi | S8 | Sedan | 5.2L V10 | |
| 2005 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2009 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2009 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2008 | Audi | S8 | Sedan | 5.2L V10 |