Audi A8/S8 Heater Coolant Return Hose / Line 4E1819674C
OEM Part #: 4E1-819-674-C (4E1819674C)
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 that may fit your vehicle
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Coolant / Water Hose
Coolant / Water Hose
Coolant / Water Tube / Pipe
Coolant Expansion Tank Hose / Line
- Genuine OEM — real photos
- 30-day returns on eligible parts
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- Ships from our own indoor warehouse
The HEATER COOLANT RETURN HOSE (OEM Part Number 4E1819674C) is a crucial component designed for a precise fit in various Audi models, including the A8 Quattro (2005-2010) and S8 (2007-2010). This factory-original part channels coolant from the heater valve to the connector, ensuring efficient heat transfer and optimal cabin temperature. Over time, hoses may wear out or become damaged, leading to leaks or inefficient heating. By replacing your old or malfunctioning hose with this authentic OEM part, you restore proper function and reliability to your vehicle’s HVAC system. This part is also known as the HVAC Heater Hose and directly replaces worn components with guaranteed compatibility.
Specifications
| Fits Vehicle Model | A8, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4E1-819-674-C (4E1819674C) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 8 vehicle configurations across 1 make, 2005-2009.
View all 8 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 | |
| 2007 | Audi | S8 | Sedan | 5.2L V10 | |
| 2008 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2008 | Audi | S8 | Sedan | 5.2L V10 | |
| 2009 | Audi | A8 | Quattro L Sedan | 6.0L W12 | |
| 2009 | Audi | S8 | Sedan | 5.2L V10 |