2005-2009 Audi A8 Coolant Pipe / Tube / Line 4E0121397A
OEM Part #: 4E0-121-397-A (4E0121397A)
Actual photo
The exact part you’ll receive — not a stock photo.
$94.49
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: 681684
Donor Vehicle: 2005 Audi A8 · 6.0L
2 photos
$94.49
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
This used OEM Audi coolant pipe—also called a tube or line, OEM part number 4E0121397A—comes from a donor vehicle. Designed for the 6.0L W12 (EA398) in the A8 Quattro, it routes coolant between components. When this pipe cracks or its O-rings fail, you'll notice coolant loss, low-level warnings, or engine overheating.
Specifications
| Fits Vehicle Model | A8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4E0-121-397-A (4E0121397A) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 5 vehicle configurations across 1 make, 2005-2009.
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 5 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2008 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2009 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2005 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2007 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2006 | Audi | A8 | Quattro L Sedan | 6.0L W12 |