2005-2009 Audi Auxiliary Radiator Coolant Hose / Line w/ Thermostat 4E0121030A
OEM Part #: 4E0-121-030-A (4E0121030A)
This page covers one exact OEM part number. Every unit we stocked has sold.
We may be able to get another
Used OEM parts are one-of-a-kind. We sometimes get another when we dismantle a matching vehicle, but we can’t say when — browse what’s in stock now:
Other Coolant Hose / Pipe / Line / Radiator / Radiator Coolant Hose / Thermostat that may fit your vehicle
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This genuine Audi auxiliary radiator coolant hose with thermostat (OEM Part Number: 4B3121113A) is specifically designed to ensure optimal cooling performance for your Audi A8 Quattro models from 2005 to 2009. As part of the vehicle's cooling system, this component plays a critical role in maintaining proper engine temperature by regulating coolant flow. Common issues such as leaks, wear, or malfunctioning thermostats can lead to overheating, making this authentic OEM part essential for reliable operation and longevity. Alternative part number 4E0121030A also ensures compatibility across various engine configurations, restoring function and efficiency to your vehicle’s cooling system.
Specifications
| Fits Vehicle Model | A8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4E0-121-030-A (4E0121030A) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 5 vehicle configurations across 1 make, 2005-2009.
View all 5 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2005 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2006 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2007 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2008 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2009 | Audi | A8 | Quattro L Sedan | 6.0L W12 |