2013-2018 Audi A8/S8 Coolant Hose / Line 4H0121081AT
OEM Part #: 4H0-121-081-AT (4H0121081AT)
Actual photo
The exact part you’ll receive — not a stock photo.
$14.99
Used
Donor2015 Audi A8 · 4.0L
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Genuine OEM Used
SKU: 674764
Donor Vehicle: 2015 Audi A8 · 4.0L
2 photos
$14.99
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Genuine OEM Used
SKU: 577799
Donor Vehicle: 2014 Audi A8 · 4.0L
2 photos
$14.99
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Genuine OEM Used
SKU: 665399
Donor Vehicle: 2015 Audi A8 · 4.0L
2 photos
$14.99
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Audi coolant hose / line, OEM part number 4H0121081AT — a genuine used unit removed from a donor vehicle. This hose (also called coolant line) directs engine coolant through the system on the 4.0L turbocharged V8 found in the A8 and S8. When the rubber deteriorates or the fitting cracks, coolant can leak, leading to overheating or low-coolant warnings.
Specifications
| Fits Vehicle Model | A8, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4H0-121-081-AT (4H0121081AT) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 15 vehicle configurations across 1 make, 2013-2018.
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 15 vehicle configurations — 9 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2017 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2016 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2018 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2018 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2017 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2015 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2016 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2015 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2015 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |
| 2013 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | S8 | Sedan | 4.0L V8 Turbo |