2002-2009 Audi Coolant / Water Reservoir / Overflow / Expansion Tank 8E0121403
OEM Part #: 8E0-121-403 (8E0121403)
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 Reservoir / Tank that may fit your vehicle
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The OEM Coolant / Water Reservoir (Part Number 8E0121403) is an authentic replacement component for various Audi models, including the A4, A4 Quattro, and A6, spanning model years 2002 to 2009. Positioned in the engine bay on the driver's side, this expansion tank is crucial for maintaining optimal engine temperatures by securely holding the coolant/antifreeze mixture. It features an integrated level sensor for monitoring coolant levels, ensuring precision in engine cooling management. Common issues with this reservoir include wear, damage, or failure that can lead to overheating. This genuine part not only guarantees compatibility but also contributes to the overall reliability of your Audi's cooling system.
Level sensor is integrated in this tank.
Specifications
| Fits Vehicle Model | A4 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8E0-121-403 (8E0121403) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 48 vehicle configurations across 1 make, 2002-2009.
View all 48 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2002 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2002 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2002 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2003 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2003 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2003 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2003 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2004 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2004 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2004 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2004 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Sedan | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2005 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Quattro Wagon | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2005 | Audi | A4 | Quattro Wagon | 3.2L V6 | |
| 2005 | Audi | A4 | Quattro Sedan | 1.8L l4 Turbo | |
| 2005 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2005 | Audi | A4 | Quattro Sedan | 3.2L V6 | |
| 2006 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2006 | Audi | A4 | Sedan | 3.2L V6 | |
| 2006 | Audi | A4 | Convertible | 1.8L l4 Turbo | |
| 2006 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2006 | Audi | A4 | Quattro Wagon | 3.2L V6 | |
| 2006 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2006 | Audi | A4 | Quattro Sedan | 3.2L V6 | |
| 2007 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2007 | Audi | A4 | Sedan | 3.2L V6 | |
| 2007 | Audi | A4 | Convertible | 2.0L l4 Turbo | |
| 2007 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2007 | Audi | A4 | Quattro Wagon | 3.2L V6 | |
| 2007 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2007 | Audi | A4 | Quattro Sedan | 3.2L V6 | |
| 2007 | Audi | A4 | Quattro Convertible | 2.0L l4 Turbo | |
| 2007 | Audi | A4 | Quattro Convertible | 3.2L V6 | |
| 2008 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2008 | Audi | A4 | Sedan | 3.2L V6 | |
| 2008 | Audi | A4 | Convertible | 2.0L l4 Turbo | |
| 2008 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2008 | Audi | A4 | Quattro Wagon | 3.2L V6 | |
| 2008 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2008 | Audi | A4 | Quattro Sedan | 3.2L V6 | |
| 2008 | Audi | A4 | Quattro Convertible | 2.0L l4 Turbo | |
| 2008 | Audi | A4 | Quattro Convertible | 3.2L V6 | |
| 2009 | Audi | A4 | Convertible | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Convertible | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Convertible | 3.2L V6 |