2004-2007 Audi A8 Coolant Hose / Line 4E0121445D
OEM Part #: 4E0-121-445-D (4E0121445D)
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The OEM Engine Coolant Hose, part number 4E0121445D, is a critical component found in the lower radiator hose assembly of the 2004-2006 Audi A8 Quattro equipped with a 4.2L V8 engine. This genuine manufacturer part plays an essential role in regulating coolant flow between the engine and radiator, ensuring optimal operating temperatures and preventing overheating. Common issues that may necessitate replacement include visible wear, cracking, or leaks due to age or exposure to high temperatures. For enhanced compatibility, this hose may also reference alternative part numbers like 4E0121447D and 4E1819674A. Replace your worn coolant hose with an authentic OEM part to maintain your vehicle's performance and reliability.
Specifications
| Fits Vehicle Model | A8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4E0-121-445-D (4E0121445D) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 7 vehicle configurations across 1 make, 2004-2007.
View all 7 vehicle configurations — 7 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2005 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM |
| 2007 | Audi | A8 | Quattro Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM |
| 2006 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM |
| 2006 | Audi | A8 | Quattro Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM |
| 2007 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM |
| 2004 | Audi | A8 | Quattro L Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM |
| 2005 | Audi | A8 | Quattro Sedan | 4.2L V8 | For Vehicles with Engine Code(s) BFM |