2019-2020 Audi A6 Coolant Reservoir Breather Hose / Line 4K1121081E
OEM Part #: 4K1-121-081-E (4K1121081E)
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The exact part you’ll receive — not a stock photo.
$14.99
Used
Donor2019 Audi A6 · 3.0L
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Genuine OEM Used
SKU: 567500
Donor Vehicle: 2019 Audi A6 · 3.0L
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$14.99
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This used OEM Audi Coolant Reservoir Breather Hose / Line, part number 4K1121081E, was removed from a donor vehicle. Also known as the expansion tank vent line, it routes excess pressure and coolant vapor from the reservoir back to the system on 2.9L or 3.0L turbo V6 MHEV engines (fitted to A6 Quattro and S7 models). A failing breather hose can cause coolant leaks, loss of pressure, and overheating—so replacing a cracked or swollen line restores proper cooling system operation.
Specifications
| Fits Vehicle Model | A6 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4K1-121-081-E (4K1121081E) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 2 vehicle configurations across 1 make, 2019-2020.
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 2 vehicle configurations — 2 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2020 | Audi | A6 | Quattro Sedan | 3.0L V6 Turbo | For Vehicles With Production date Up To 03/18/19 |
| 2019 | Audi | A6 | Quattro Sedan | 3.0L V6 Turbo | For Vehicles With Production date Up To 03/18/19 |