2011-2018 Audi A8/S8 Radiator 4H0121251B
OEM Part #: 4H0-121-251-B (4H0121251B)
Actual photo
The exact part you’ll receive — not a stock photo.
$112.49
Used
Donor2013 Audi A8 · 4.0L
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Only 2 in stock — no guaranteed restock
Genuine OEM Used
SKU: 609413
Donor Vehicle: 2013 Audi A8 · 4.0L
3 photos
HAS A BEND AND BENT FINS, SEE PICTURES
$112.49
30-Day Returns
Genuine OEM Used
SKU: 665411
Donor Vehicle: 2015 Audi A8 · 4.0L
5 photos
HAS A BROKEN MOUNT AND IS SLIGHTLY BENT. SOME BENT FINS, SEE PICTURES
$127.99
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
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This genuine OEM Audi radiator (4H0121251B) is a used component removed from a donor vehicle. Designed for the 4.0L turbocharged V8, 4.2L naturally aspirated V8, and 6.3L W12, it circulates coolant to prevent engine overheating. A failing radiator often causes coolant leaks, temperature spikes, or visible corrosion at the plastic tanks—leaving the engine vulnerable to heat damage. Proper installation restores reliable cooling in demanding driving conditions.
Specifications
| Fits Vehicle Model | A8, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4H0-121-251-B (4H0121251B) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 24 vehicle configurations across 1 make, 2011-2018.
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 24 vehicle configurations — 15 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2016 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2017 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2018 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2018 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2017 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2016 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2011 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2011 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2012 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2012 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2012 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2013 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CEUA |
| 2013 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2014 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CEUA |
| 2014 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2013 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CEUA |
| 2014 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CEUA |
| 2013 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CEUA |
| 2015 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2015 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2015 | Audi | A8 | Quattro L Sedan | 6.3L W12 | |
| 2016 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2015 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CTGA, CTGF |
| 2014 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) CEUA |