2015-2018 Audi A8/S8 Coolant Hose / Tube / Line (LOWER) Left 4H0121481AH
OEM Part #: 4H0-121-481-AH (4H0121481AH)
Actual photo
The exact part you’ll receive — not a stock photo.
$23.49
Side: Left
Used
Donor2017 Audi A8 · 4.0L
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Genuine OEM Used
SKU: 612280
Donor Vehicle: 2017 Audi A8 · 4.0L
2 photos
$23.49
30-Day Returns
Genuine OEM Used
SKU: 674760
Donor Vehicle: 2015 Audi A8 · 4.0L
2 photos
$26.49
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
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This used OEM Audi coolant hose (part 4H0121481AH) is the lower left tube or line for the 4.0L turbocharged V8 (3993cc) found in the A8 Quattro and S8. As a lower coolant hose, it circulates coolant from the radiator to the engine block; a cracked or collapsed hose can cause overheating, steam from the engine bay, or visible antifreeze puddling beneath the vehicle.
Specifications
| Fits Vehicle Model | A8, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4H0-121-481-AH (4H0121481AH) |
| Side | Left |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 9 vehicle configurations across 1 make, 2015-2018.
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 9 vehicle configurations — 9 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2015 | Audi | A8 | Quattro 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 |
| 2016 | Audi | A8 | Quattro L 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 | 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 |
| 2017 | 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 |
| 2018 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTFA, CTGA, CTGF, DDTA |