2005-2006 Audi A8 Coolant Hose / Line 4E0121448AD
OEM Part #: 4E0-121-448-AD (4E0121448AD)
Actual photo
The exact part you’ll receive — not a stock photo.
$129.99
Used
Donor2005 Audi A8 · 6.0L
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Genuine OEM Used
SKU: 681675
Donor Vehicle: 2005 Audi A8 · 6.0L
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$129.99
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The Audi Coolant Hose / Line (OEM 4E0121448AD) is a used genuine part from a donor vehicle. Also replaces 4E0121448AB. Designed for the 6.0L W12 engine, this coolant line circulates fluid to prevent overheating. A cracked or collapsed hose can cause leaks and engine temperature spikes, leading to potential head gasket failure. Proper routing and secure clamps are critical for this naturally aspirated DOHC application.
Specifications
| Fits Vehicle Model | A8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4E0-121-448-AD (4E0121448AD) |
| Compatible OEM Part No | 4E0-121-448-AB |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 2 vehicle configurations across 1 make, 2005-2006.
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 2 vehicle configurations — 1 with fitment note
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2005 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2006 | Audi | A8 | Quattro L Sedan | 6.0L W12 | For Vehicles Where Last 6 Digits of VIN Number are Less Than 011642 |