2007-2008 Audi RS4 Coolant Reservoir Tank Vent Hose / Line 8E0121107AD
OEM Part #: 8E0-121-107-AD (8E0121107AD)
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The exact part you’ll receive — not a stock photo.
$69.99
Used
Donor2007 Audi RS4 · 4.2L
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Genuine OEM Used
SKU: 713330
Donor Vehicle: 2007 Audi RS4 · 4.2L
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$69.99
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A used OEM Audi coolant reservoir vent hose (8E0121107AD) was removed from a donor RS4. This vent line, also called the coolant reservoir tank vent hose, relieves pressure and allows coolant expansion in the 4.2L V8’s cooling system. A cracked or clogged hose can cause coolant loss, steam from the reservoir, or air pockets that lead to overheating. It’s a simple push-fit replacement for the factory line.
Specifications
| Fits Vehicle Model | RS4 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8E0-121-107-AD (8E0121107AD) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 3 vehicle configurations across 1 make, 2007-2008.
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 3 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2007 | Audi | RS4 | Sedan | 4.2L V8 | |
| 2008 | Audi | RS4 | Convertible | 4.2L V8 | |
| 2008 | Audi | RS4 | Sedan | 4.2L V8 |