2012-2018 Audi A6/A7/S6/S7 Auxiliary / Secondary Radiator Left 4G0121212
OEM Part #: 4G0-121-212 (4G0121212)
Actual photo
The exact part you’ll receive — not a stock photo.
$112.49
Side: Left
Used
Donor2018 Audi S7 · 4.0L
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Only 2 in stock — no guaranteed restock
Genuine OEM Used
SKU: 715367
Donor Vehicle: 2018 Audi S7 · 4.0L
4 photos
SOME BENT FINS, SEE PICTURES
$112.49
30-Day Returns
Genuine OEM Used
SKU: 698568
Donor Vehicle: 2014 Audi S6 · 4.0L
3 photos
SOME BENT FINS, SEE PICTURES
$112.49
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
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A used genuine OEM Audi auxiliary / secondary radiator, part number 4G0121212, is a left-side unit from a donor vehicle. This secondary radiator handles additional engine cooling for high-performance applications, particularly in supercharged or turbocharged V6 and V8 engines. When the auxiliary radiator fails or becomes clogged, the primary cooling system can struggle to maintain proper temperatures, leading to potential overheating under load. It is a direct replacement for the original left-mounted unit on compatible Audi A6, S6, A7, and S7 models.
Specifications
| Fits Vehicle Model | A6, A7, S6, S7 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4G0-121-212 (4G0121212) |
| Side | Left |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 23 vehicle configurations across 1 make, 2012-2018.
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 23 vehicle configurations — 2 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2012 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2013 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2013 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2014 | Audi | A6 | Quattro Sedan | 3.0L V6 Diesel Turbo | For Vehicles with Engine Code(s) CGQB |
| 2014 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2015 | Audi | A6 | Quattro Sedan | 3.0L V6 Diesel Turbo | For Vehicles with Engine Code(s) CGQB |
| 2015 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2016 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2016 | Audi | A6 | Quattro Sedan | 3.0L V6 Diesel Turbo | |
| 2016 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | |
| 2016 | Audi | A7 | Quattro Hatchback | 3.0L V6 Diesel Turbo | |
| 2016 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2016 | Audi | S7 | Hatchback | 4.0L V8 Turbo | |
| 2017 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2017 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | |
| 2017 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2017 | Audi | S7 | Hatchback | 4.0L V8 Turbo | |
| 2018 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | |
| 2018 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | |
| 2018 | Audi | S6 | Sedan | 4.0L V8 Turbo | |
| 2018 | Audi | S7 | Hatchback | 4.0L V8 Turbo |