2020-2026 Audi RS Q8/RS6/RS7/S8/SQ7/SQ8 Coolant Thermostat 0P2121115B
OEM Part #: 0P2-121-115-B (0P2121115B)
Actual photo
The exact part you’ll receive — not a stock photo.
$89.99
Used
Donor2021 Audi SQ8 · 4.0L · 47k miles
✓ Free Same Day Shipping on orders by noon CT
Only 1 in stock — no guaranteed restock
Genuine OEM Used
SKU: 701422
Donor Vehicle: 2021 Audi SQ8 · 4.0L · 47k miles
2 photos
$89.99
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
- eBay Top Rated · 100,000+ positive ratings
- Ships from our own indoor warehouse
A used OEM Audi Coolant Thermostat, part number 0P2121115B, replaces earlier versions 0P2121115A, 0P2121115C, and 0P2121115D. This thermostat regulates engine temperature for the 4.0L 3996cc twin-turbo V8 found in the RS6, RS7, and other Audi performance models. When the thermostat fails, common symptoms include erratic temperature gauge readings, coolant leaks, or the engine failing to reach operating temperature.
Specifications
| Fits Vehicle Model | RS Q8, RS6, RS7, S8, SQ7, SQ8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 0P2-121-115-B (0P2121115B) |
| Compatible OEM Part No | 0P2-121-115-A, 0P2-121-115-C, 0P2-121-115-D |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 37 vehicle configurations across 1 make, 2020-2026.
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 37 vehicle configurations — 1 with fitment note
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2025 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2021 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2024 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2023 | Audi | RS6 | Wagon Wagon | 4.0L V8 Turbo | |
| 2023 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2023 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2022 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2022 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2022 | Audi | RS6 | Wagon Wagon | 4.0L V8 Turbo | |
| 2021 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2021 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2026 | Audi | RS6 | Wagon Wagon | 4.0L V8 Turbo | |
| 2021 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2021 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2020 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2020 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2020 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2020 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2024 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2026 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | Main |
| 2021 | Audi | RS6 | Wagon Wagon | 4.0L V8 Turbo | |
| 2025 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2023 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2025 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2025 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2025 | Audi | RS6 | Wagon Wagon | 4.0L V8 Turbo | |
| 2025 | Audi | RS6 | Wagon GT Wagon | 4.0L V8 Turbo | |
| 2025 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2024 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2024 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2024 | Audi | RS6 | Wagon Wagon | 4.0L V8 Turbo | |
| 2024 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2023 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2022 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2022 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | |
| 2022 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2023 | Audi | SQ8 | SUV | 4.0L V8 Turbo |