2002-2009 Audi A4/RS4/S4 Clutch Master Cylinder 8E1721401AJ
OEM Part #: 8E1-721-401-AJ (8E1721401AJ)
Actual photo
The exact part you’ll receive — not a stock photo.
$79.99
Used
Donor2007 Audi RS4 · 4.2L
✓ Free Same Day Shipping on orders by noon CT
Only 1 in stock — no guaranteed restock
Genuine OEM Used
SKU: 712989
Donor Vehicle: 2007 Audi RS4 · 4.2L
2 photos
$79.99
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
Audi clutch master cylinder OEM 8E1721401AJ — a used genuine part pulled from a donor vehicle. This master cylinder (also replaces 8E1721401S, 8E1721401L, 8E1721401T, and others in the 8E1 series) converts pedal force into hydraulic pressure to disengage the clutch. A failing unit often causes a soft, spongy, or sinking pedal, or visible fluid leaks near the firewall or under the dash. Fits several Audi models with 1.8T–4.2L engines, including EA113 and EA837 families.
Specifications
| Fits Vehicle Model | A4, RS4, S4 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8E1-721-401-AJ (8E1721401AJ) |
| Compatible OEM Part No | 8E1-721-401-S, 8E1-721-401-L, 8E1-721-401-T, 8E1-721-401-H, 8E1-721-401-M, 8E1-721-401-D |
| Category | Transmission |
Compatible Vehicles
Fits 85 vehicle configurations across 1 make, 2002-2009.
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 85 vehicle configurations — 31 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2002 | Audi | A4 | Quattro Wagon | 3.0L V6 | |
| 2005 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2006 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2003 | Audi | A4 | Convertible | 3.0L V6 | |
| 2004 | Audi | A4 | Sedan | 3.0L V6 | |
| 2003 | Audi | A4 | Sedan | 3.0L V6 | |
| 2004 | Audi | A4 | Convertible | 3.0L V6 | |
| 2003 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2004 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2008 | Audi | A4 | Sedan | 3.2L V6 | For Manual Transmission |
| 2002 | Audi | A4 | Sedan | 3.0L V6 | |
| 2007 | Audi | S4 | Wagon | 4.2L V8 | For Manual Transmission |
| 2007 | Audi | A4 | Quattro Wagon | 3.2L V6 | For Manual Transmission |
| 2008 | Audi | S4 | Sedan | 4.2L V8 | For Manual Transmission |
| 2008 | Audi | S4 | Convertible | 4.2L V8 | |
| 2008 | Audi | RS4 | Convertible | 4.2L V8 | |
| 2008 | Audi | S4 | Wagon | 4.2L V8 | For Manual Transmission |
| 2005 | Audi | S4 | Convertible | 4.2L V8 | |
| 2009 | Audi | A4 | Quattro Convertible | 3.2L V6 | |
| 2005 | Audi | S4 | Wagon | 4.2L V8 | For Manual Transmission |
| 2006 | Audi | A4 | Quattro Wagon | 3.2L V6 | For Manual Transmission |
| 2004 | Audi | S4 | Sedan | 4.2L V8 | |
| 2006 | Audi | A4 | Sedan | 3.2L V6 | For Manual Transmission |
| 2008 | Audi | RS4 | Sedan | 4.2L V8 | |
| 2008 | Audi | A4 | Quattro Wagon | 3.2L V6 | For Manual Transmission |
| 2007 | Audi | S4 | Sedan | 4.2L V8 | For Manual Transmission |
| 2005 | Audi | A4 | Convertible | 3.0L V6 | |
| 2007 | Audi | A4 | Quattro Convertible | 3.2L V6 | |
| 2007 | Audi | S4 | Convertible | 4.2L V8 | |
| 2005 | Audi | A4 | Quattro Wagon | 3.0L V6 | |
| 2005 | Audi | S4 | Sedan | 4.2L V8 | For Manual Transmission |
| 2008 | Audi | A4 | Quattro Convertible | 3.2L V6 | |
| 2005 | Audi | A4 | Quattro Sedan | 3.0L V6 | |
| 2005 | Audi | A4 | Quattro Wagon | 3.2L V6 | For Manual Transmission |
| 2005 | Audi | A4 | Sedan | 3.0L V6 | |
| 2005 | Audi | A4 | Quattro Sedan | 3.2L V6 | For Manual Transmission |
| 2006 | Audi | A4 | Quattro Sedan | 3.2L V6 | For Manual Transmission |
| 2006 | Audi | A4 | Quattro Convertible | 3.0L V6 | |
| 2004 | Audi | S4 | Convertible | 4.2L V8 | |
| 2006 | Audi | S4 | Sedan | 4.2L V8 | For Manual Transmission |
| 2007 | Audi | A4 | Quattro Sedan | 3.2L V6 | For Manual Transmission |
| 2007 | Audi | A4 | Sedan | 3.2L V6 | For Manual Transmission |
| 2006 | Audi | S4 | Convertible | 4.2L V8 | |
| 2007 | Audi | RS4 | Sedan | 4.2L V8 | |
| 2004 | Audi | S4 | Wagon | 4.2L V8 | |
| 2005 | Audi | A4 | Quattro Convertible | 3.0L V6 | |
| 2009 | Audi | S4 | Convertible | 4.2L V8 | |
| 2006 | Audi | S4 | Wagon | 4.2L V8 | For Manual Transmission |
| 2003 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2004 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2008 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Manual Transmission |
| 2004 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2003 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2006 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Manual Transmission |
| 2007 | Audi | A4 | Quattro Convertible | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Convertible | 2.0L l4 Turbo | |
| 2004 | Audi | A4 | Quattro Wagon | 3.0L V6 | |
| 2003 | Audi | A4 | Quattro Sedan | 3.0L V6 | |
| 2003 | Audi | A4 | Quattro Wagon | 3.0L V6 | |
| 2004 | Audi | A4 | Quattro Sedan | 3.0L V6 | |
| 2004 | Audi | A4 | Quattro Convertible | 3.0L V6 | |
| 2002 | Audi | A4 | Quattro Sedan | 3.0L V6 | |
| 2006 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2005 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Manual Transmission |
| 2008 | Audi | A4 | Convertible | 2.0L l4 Turbo | |
| 2008 | Audi | A4 | Quattro Sedan | 3.2L V6 | For Manual Transmission |
| 2005 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2002 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2002 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2004 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2009 | Audi | A4 | Convertible | 2.0L l4 Turbo | |
| 2002 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2008 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2008 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2007 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2007 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Manual Transmission |
| 2006 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2007 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Manual Transmission |
| 2003 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2007 | Audi | A4 | Convertible | 2.0L l4 Turbo | |
| 2008 | Audi | A4 | Quattro Convertible | 2.0L l4 Turbo |