2005-2011 Audi A6 Heater Core Coolant Hose / Line 4F0819378B
OEM Part #: 4F0-819-378-B (4F0819378B)
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The exact part you’ll receive — not a stock photo.
$43.49
Used
Donor2010 Audi A6 · 3.0L
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Genuine OEM Used
SKU: 664994
Donor Vehicle: 2010 Audi A6 · 3.0L
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$43.49
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The genuine OEM heater core coolant hose/line 4F0819378B is a used part sourced from an Audi A6. Also called the heater hose or coolant line, it routes hot coolant to the heater core for cabin heat. Common failure symptoms include coolant leaks, low coolant levels, or reduced heater output. This hose fits naturally aspirated and supercharged V6 engines in the Audi A6 and A6 Quattro. A cracked or swollen hose may also produce a sweet coolant smell inside the vehicle.
Specifications
| Fits Vehicle Model | A6 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4F0-819-378-B (4F0819378B) |
| Category | HVAC / Climate Control |
Compatible Vehicles
Fits 19 vehicle configurations across 1 make, 2005-2011.
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 |
|---|---|---|---|---|---|
| 2009 | Audi | A6 | Sedan | 3.2L V6 | |
| 2011 | Audi | A6 | Sedan | 3.2L V6 | |
| 2010 | Audi | A6 | Sedan | 3.2L V6 | |
| 2007 | Audi | A6 | Quattro Sedan | 3.2L V6 | |
| 2007 | Audi | A6 | Quattro Wagon | 3.2L V6 | |
| 2008 | Audi | A6 | Quattro Wagon | 3.2L V6 | |
| 2008 | Audi | A6 | Quattro Sedan | 3.2L V6 | |
| 2006 | Audi | A6 | Sedan | 3.2L V6 | |
| 2007 | Audi | A6 | Sedan | 3.2L V6 | |
| 2006 | Audi | A6 | Quattro Sedan | 3.2L V6 | |
| 2008 | Audi | A6 | Sedan | 3.2L V6 | |
| 2005 | Audi | A6 | Quattro Sedan | 3.2L V6 | |
| 2006 | Audi | A6 | Quattro Wagon | 3.2L V6 | |
| 2009 | Audi | A6 | Quattro Wagon | 3.0L V6 Supercharged | |
| 2010 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2009 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2010 | Audi | A6 | Quattro Wagon | 3.0L V6 Supercharged | |
| 2011 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2011 | Audi | A6 | Quattro Wagon | 3.0L V6 Supercharged |