Audi A5/RS5/S4/S5 Coolant Reservoir / Tank / Bottle 8W1121405F
OEM Part #: 8W1-121-405-F (8W1121405F)
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 Coolant Reservoir / Tank that may fit your vehicle
Coolant Reservoir / Bottle / Tank Cap
Coolant Reservoir / Tank / Bottle
Coolant Reservoir / Tank / Bottle
Coolant Reservoir / Tank / Bottle
Coolant Reservoir / Tank / Bottle Cap
Coolant Reservoir / Tank / Bottle Cap
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This genuine Audi coolant reservoir (OEM Part Number 8W1121405F) serves as a critical component in your vehicle's cooling system, located near the engine compartment. Designed to store coolant, it prevents engine overheating and maintains optimal operating temperatures. Common issues such as cracks, leaks, or damage can compromise performance and lead to engine failures. This reservoir is compatible with Audi models including the RS5, S4, S5, and S5 Sportback for the model years 2018 to 2023, featuring 2.9L V6 and 3.0L V6 engines. Ensure the longevity of your vehicle’s cooling function with this factory-original part. Alternate names include coolant tank and expansion tank.
Specifications
| Fits Vehicle Model | A5, RS5, S4, S5 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8W1-121-405-F (8W1121405F) |
| Compatible OEM Part No | 8W1-121-405-E, 8W1-121-405-J, 8W1-121-405-K |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 27 vehicle configurations across 1 make, 2017-2021.
View all 27 vehicle configurations — 27 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2017 | Audi | S5 | Convertible | 3.0L V6 Supercharged | For Vehicles With Production date Up To 05/25/20 |
| 2017 | Audi | S5 | Coupe | 3.0L V6 Supercharged | For Vehicles With Production date Up To 06/15/20 |
| 2018 | Audi | A5 | Hatchback | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/13/17 |
| 2018 | Audi | RS5 | Coupe | 2.9L V6 Turbo | For Vehicles With Production date Up To 11/13/17 |
| 2018 | Audi | S4 | Sedan | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2018 | Audi | S5 | Convertible | 3.0L V6 Turbo | For Vehicles With Production date Up To 05/25/20 |
| 2018 | Audi | S5 | Coupe | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2018 | Audi | S5 | Hatchback | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2019 | Audi | A5 | Hatchback | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2019 | Audi | RS5 | Coupe | 2.9L V6 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2019 | Audi | RS5 | Hatchback | 2.9L V6 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2019 | Audi | S4 | Sedan | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2019 | Audi | S5 | Convertible | 3.0L V6 Turbo | For Vehicles With Production date Up To 05/25/20 |
| 2019 | Audi | S5 | Coupe | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2019 | Audi | S5 | Hatchback | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2020 | Audi | A5 | Hatchback | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2020 | Audi | S4 | Sedan | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2020 | Audi | S5 | Convertible | 3.0L V6 Turbo | For Vehicles With Production date Up To 05/25/20 |
| 2020 | Audi | S5 | Coupe | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2020 | Audi | S5 | Hatchback | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2021 | Audi | RS5 | Coupe | 2.9L V6 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2021 | Audi | RS5 | Hatchback | 2.9L V6 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2021 | Audi | S4 | Sedan | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2021 | Audi | S5 | Convertible | 3.0L V6 Turbo | For Vehicles With Production date Up To 05/25/20 |
| 2021 | Audi | S5 | Coupe | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2021 | Audi | S5 | Hatchback | 3.0L V6 Turbo | For Vehicles With Production date Up To 06/15/20 |
| 2021 | Audi | A5 | Hatchback | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |