2004-2009 Audi RS4/S4 Coolant Reservoir / Tank / Bottle 8E0121403F
OEM Part #: 8E0-121-403-F (8E0121403F)
Actual photo
The exact part you’ll receive — not a stock photo.
$43.49
Used
Donor2007 Audi RS4 · 4.2L
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Genuine OEM Used
SKU: 713149
Donor Vehicle: 2007 Audi RS4 · 4.2L
4 photos
$43.49
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Genuine OEM Used
SKU: 652537
Donor Vehicle: 2008 Audi S4 · 4.2L
3 photos
$43.49
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A used OEM Audi Coolant Reservoir / Tank / Bottle, part number 8E0121403F, from a 4.2L V8-powered RS4 or S4. This expansion tank stores and deaerates coolant in the pressurized cooling system. Over time, the plastic can become brittle and develop cracks at the neck or seam, leading to coolant loss and overheating. Fits the 4.2L 4163CC and 4172CC naturally aspirated V8 engines.
Specifications
| Fits Vehicle Model | RS4, S4 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8E0-121-403-F (8E0121403F) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 19 vehicle configurations across 1 make, 2004-2009.
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 19 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2008 | Audi | S4 | Convertible | 4.2L V8 | |
| 2006 | Audi | S4 | Wagon | 4.2L V8 | |
| 2009 | Audi | S4 | Convertible | 4.2L V8 | |
| 2004 | Audi | S4 | Wagon | 4.2L V8 | |
| 2008 | Audi | RS4 | Sedan | 4.2L V8 | |
| 2004 | Audi | S4 | Sedan | 4.2L V8 | |
| 2005 | Audi | S4 | Wagon | 4.2L V8 | |
| 2007 | Audi | S4 | Sedan | 4.2L V8 | |
| 2008 | Audi | S4 | Wagon | 4.2L V8 | |
| 2008 | Audi | RS4 | Convertible | 4.2L V8 | |
| 2008 | Audi | S4 | Sedan | 4.2L V8 | |
| 2007 | Audi | S4 | Wagon | 4.2L V8 | |
| 2005 | Audi | S4 | Convertible | 4.2L V8 | |
| 2007 | Audi | S4 | Convertible | 4.2L V8 | |
| 2007 | Audi | RS4 | Sedan | 4.2L V8 | |
| 2006 | Audi | S4 | Convertible | 4.2L V8 | |
| 2006 | Audi | S4 | Sedan | 4.2L V8 | |
| 2004 | Audi | S4 | Convertible | 4.2L V8 | |
| 2005 | Audi | S4 | Sedan | 4.2L V8 |