Audi Auxiliary / Secondary Radiator 8K0121212C
OEM Part #: 8K0-121-212-C (8K0121212C)
This page covers one exact OEM part number. Every unit we stocked has sold.
We may be able to get another
Used OEM parts are one-of-a-kind. We sometimes get another when we dismantle a matching vehicle, but we can’t say when — browse what’s in stock now:
Other Radiator that may fit your vehicle
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The Auxiliary Radiator (OEM Part Number 8K0121212C) is an essential component designed for high-performance Audi vehicles, including the RS3, RS5, RS7, S8, and TT RS. This genuine OEM part plays a critical role in the cooling system by distributing coolant to maintain optimal engine temperatures, particularly in models with high heat output like the 4.0L V8 and the 2.5L L5 engines. It is typically located at the front section of the engine bay, complementing the primary radiator. Over time, radiators can suffer from leaks or blockages, leading to engine overheating. Replacing a worn or damaged auxiliary radiator with this authentic part ensures effective cooling performance, preventing potential engine damage. This part is compatible across multiple years, including 2013–2023 Audi RS models and the 2015–2018 S8, offering a reliable solution to maintain your vehicle’s functionality. Other part numbers include 4G0260403T and 4H0121207C, emphasizing the wide application of this component in various Audi models.
Specifications
| Fits Vehicle Model | A8, RS3, RS5, RS7, S8, TT RS |
| Fits Vehicle Make | Audi |
| OEM Part No | 8K0-121-212-C (8K0121212C) |
| Compatible OEM Part No | 8K0-121-212-D |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 29 vehicle configurations across 1 make, 2013-2022.
View all 29 vehicle configurations — 9 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2013 | Audi | RS5 | Convertible | 4.2L V8 | |
| 2013 | Audi | RS5 | Coupe | 4.2L V8 | |
| 2014 | Audi | RS5 | Coupe | 4.2L V8 | |
| 2014 | Audi | RS5 | Convertible | 4.2L V8 | |
| 2014 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2015 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2015 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2015 | Audi | RS5 | Coupe | 4.2L V8 | |
| 2015 | Audi | RS5 | Convertible | 4.2L V8 | |
| 2015 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2015 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2016 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2016 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2016 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2017 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2017 | Audi | RS3 | Sedan | 2.5L l5 Turbo | |
| 2017 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2017 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2018 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2018 | Audi | RS3 | Sedan | 2.5L l5 Turbo | |
| 2018 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2018 | Audi | S8 | Sedan | 4.0L V8 Turbo | For Vehicles with Engine Code(s) DDTA |
| 2018 | Audi | TT RS | Quattro Coupe | 2.5L l5 Turbo | |
| 2019 | Audi | RS3 | Sedan | 2.5L l5 Turbo | |
| 2019 | Audi | TT RS | Quattro Coupe | 2.5L l5 Turbo | |
| 2020 | Audi | RS3 | Sedan | 2.5L l5 Turbo | |
| 2020 | Audi | TT RS | Quattro Coupe | 2.5L l5 Turbo | |
| 2021 | Audi | TT RS | Quattro Coupe | 2.5L l5 Turbo | |
| 2022 | Audi | TT RS | Quattro Coupe | 2.5L l5 Turbo |