2004-2010 Audi A8 Coolant Expansion Tank Hose / Line 4E0121107L
OEM Part #: 4E0-121-107-L (4E0121107L)
Actual photo
The exact part you’ll receive — not a stock photo.
$14.49
Used
Donor2008 Audi A8 · 4.2L
✓ Free Same Day Shipping on orders by noon CT
Only 1 in stock — no guaranteed restock
Genuine OEM Used
SKU: 684643
Donor Vehicle: 2008 Audi A8 · 4.2L
2 photos
$14.49
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
Audi Coolant Expansion Tank Hose / Line OEM 4E0121107L is a genuine used part, also superseding 4E0121107D. This hose routes coolant between the expansion tank and the engine's cooling system on 4.2L V8 Audi A8 models. A cracked or leaking hose can cause coolant loss, overheating, or low-coolant warnings. The line is a direct replacement for the original equipment piece and must be installed with proper hose clamps.
Specifications
| Fits Vehicle Model | A8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4E0-121-107-L (4E0121107L) |
| Compatible OEM Part No | 4E0-121-107-D |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 13 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 13 vehicle configurations — 7 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2010 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2005 | Audi | A8 | Quattro Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM, BGK, BVJ |
| 2009 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2009 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2005 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM, BGK, BVJ |
| 2007 | Audi | A8 | Quattro Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM, BGK, BVJ |
| 2006 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM, BGK, BVJ |
| 2006 | Audi | A8 | Quattro Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM, BGK, BVJ |
| 2008 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2008 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2007 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM, BGK, BVJ |
| 2004 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM, BGK, BVJ |
| 2010 | Audi | A8 | Quattro Sedan | 4.2L V8 |