Audi A6/A7/RS7/S6/S7 Coolant Reservoir / Tank / Bottle 4G0121403D
OEM Part #: 4G0-121-403-D (4G0121403D)
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 / Tank / Bottle
$27.99
Fits 2012–2018 Audi
OEM: 4G0121403G
Coolant Reservoir / Tank / Bottle Cap
$7.99
Fits 1998–2024 Audi, Porsche + more
OEM: 3B0121321
Coolant Reservoir Mount / Bracket
$8.99
Fits 2016–2018 Audi
OEM: 4G0121214AF
Coolant Reservoir Mount / Bracket
$10.99
Fits 2016–2018 Audi
OEM: 4G0121214AE
- Genuine OEM — real photos
- 30-day returns on eligible parts
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- Ships from our own indoor warehouse
This genuine Audi coolant reservoir (OEM Part Number 4G0121403D) is the ideal replacement for your vehicle's cooling system. Designed for compatibility with Audi S6 (2013-2018), A7 Quattro (2012-2018), A6 and A6 Quattro (2012-2018), S7 (2013-2018), and RS7 (2014-2018) models, this factory-original part ensures a seamless fit and restores essential functionality. Often referred to as a coolant tank or reservoir tank, it plays a critical role in maintaining optimal engine temperatures. Replacing a worn or damaged reservoir can help eliminate leaks and prevent overheating, ensuring your vehicle performs at its best. Alternative part numbers include 4G0121403G and 4G0121403AG.
Specifications
| Fits Vehicle Model | A6, A7, RS7, S6, S7 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4G0-121-403-D (4G0121403D) |
| Compatible OEM Part No | 4G0-121-403-G |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 47 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 47 vehicle configurations — 40 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2012 | Audi | A6 | Sedan | 2.0L l4 Turbo | |
| 2012 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | For Vehicles with Production Date After 10/17/11 |
| 2012 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | For Vehicles with Production Date After 10/17/11 |
| 2013 | Audi | A6 | Sedan | 2.0L l4 Turbo | |
| 2013 | Audi | A6 | Quattro Sedan | 2.0L l4 Turbo | |
| 2013 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | For Vehicles with Production Date After 10/17/11 |
| 2013 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | For Vehicles with Production Date After 10/17/11 |
| 2013 | Audi | S6 | Sedan | 4.0L V8 Turbo | For Vehicles with Production Date After 10/17/11 |
| 2013 | Audi | S7 | Hatchback | 4.0L V8 Turbo | For Vehicles with Production Date After 10/17/11 |
| 2014 | Audi | A6 | Sedan | 2.0L l4 Turbo | |
| 2014 | Audi | A6 | Quattro Sedan | 2.0L l4 Turbo | |
| 2014 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | For Vehicles with Production Date After 10/17/11 |
| 2014 | Audi | A6 | Quattro Sedan | 3.0L V6 Diesel Turbo | For Vehicles with Production Date After 10/17/11 |
| 2014 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | For Vehicles with Production Date After 10/17/11 |
| 2014 | Audi | A7 | Quattro Hatchback | 3.0L V6 Diesel Turbo | For Vehicles with Production Date After 10/17/11 |
| 2014 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2014 | Audi | S6 | Sedan | 4.0L V8 Turbo | For Vehicles with Production Date After 10/17/11 |
| 2014 | Audi | S7 | Hatchback | 4.0L V8 Turbo | For Vehicles with Production Date After 10/17/11 |
| 2015 | Audi | A6 | Sedan | 2.0L l4 Turbo | |
| 2015 | Audi | A6 | Quattro Sedan | 2.0L l4 Turbo | |
| 2015 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | For Vehicles with Production Date After 10/17/11 |
| 2015 | Audi | A6 | Quattro Sedan | 3.0L V6 Diesel Turbo | For Vehicles with Production Date After 10/17/11 |
| 2015 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2015 | Audi | S6 | Sedan | 4.0L V8 Turbo | For Vehicles with Production Date After 10/17/11 |
| 2016 | Audi | A6 | Sedan | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | A6 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | A6 | Quattro Sedan | 3.0L V6 Diesel Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | A7 | Quattro Hatchback | 3.0L V6 Diesel Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | S6 | Sedan | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2016 | Audi | S7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2017 | Audi | A6 | Sedan | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2017 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/27/17 |
| 2017 | Audi | A6 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2017 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/27/17 |
| 2017 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2017 | Audi | S6 | Sedan | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2017 | Audi | S7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2018 | Audi | A6 | Sedan | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2018 | Audi | A6 | Quattro Sedan | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2018 | Audi | A6 | Quattro Sedan | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/27/17 |
| 2018 | Audi | A7 | Quattro Hatchback | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/27/17 |
| 2018 | Audi | RS7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2018 | Audi | S6 | Sedan | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |
| 2018 | Audi | S7 | Hatchback | 4.0L V8 Turbo | For Vehicles With Production date Up To 11/27/17 |