Audi A4/A5 Coolant Reservoir / Tank / Bottle 8W0121405G
OEM Part #: 8W0-121-405-G (8W0121405G)
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
$27.99
Fits 2017–2025 Audi & Porsche
OEM: 4M0121321K
Porsche: PAB12132100
Coolant Reservoir / Tank / Bottle
$59.99
Fits 2017–2021 Audi
OEM: 8W1121405J
Coolant Reservoir / Tank / Bottle
$35.99
Fits 2017–2021 Audi
OEM: 8W1121403D
Coolant Reservoir / Tank / Bottle Cap
$19.99
Fits 2017–2021 Audi & Porsche
OEM: 4M0121321J
Coolant Reservoir / Tank Bracket
$13.71
Fits 2017–2025 Audi A4 / A4 allroad / A5
OEM: 8W0121232L
- Genuine OEM — real photos
- 30-day returns on eligible parts
- eBay Top Rated · 100,000+ positive ratings
- Ships from our own indoor warehouse
Specifications
| Fits Vehicle Model | A4, A5 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8W0-121-405-G (8W0121405G) |
| Compatible OEM Part No | 8W0-121-405-F, 8W0-121-405-E |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 14 vehicle configurations across 1 make, 2019-2021.
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 14 vehicle configurations — 14 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2019 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2019 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2019 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/28/19 and 06/15/20 |
| 2019 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2019 | Audi | A5 | Hatchback | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2020 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2020 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2020 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/28/19 and 06/15/20 |
| 2020 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2020 | Audi | A5 | Hatchback | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2021 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2021 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/28/19 and 06/15/20 |
| 2021 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |
| 2021 | Audi | A5 | Hatchback | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/14/19 and 06/15/20 |