2007-2008 Audi RS4 Coolant Reservoir Tank Vent Hose / Line 8E0121107AD
OEM Part #: 8E0-121-107-AD (8E0121107AD)
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:
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- Genuine OEM — real photos
- 30-day returns on eligible parts
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- Ships from our own indoor warehouse
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.
View all 3 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2007 | Audi | RS4 | Sedan | 4.2L V8 | |
| 2008 | Audi | RS4 | Sedan | 4.2L V8 | |
| 2008 | Audi | RS4 | Convertible | 4.2L V8 |