Audi / Porsche Coolant Reservoir / Tank / Bottle 8K0121403AC
OEM Part #: 8K0-121-403-AC (8K0121403AC)
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 Bleeder Valve
Starting at $11.49
Fits 2010–2024 Porsche
OEM: 7P5121671
Coolant Reservoir / Tank / Bottle
$29.99
Fits 2009–2018 Audi & Porsche
OEM: 8K0121403G
Coolant Reservoir / Tank / Bottle
$33.99
Fits 2015–2018 Porsche Macan
Porsche: 95B121407
Coolant Reservoir / Tank / Bottle
Starting at $24.99
Fits 2011–2018 Audi & Porsche
OEM: 8K0121403Q
Coolant Reservoir / Tank / Bottle
$44.99
Fits 2009–2017 Audi
OEM: 8K0121405N
Coolant Reservoir / Tank / Bottle
Starting at $28.49
Fits 2011–2018 Audi & Porsche
OEM: 8K0121403H
- 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, allroad, Macan, Q5 |
| Fits Vehicle Make | Audi, Porsche |
| OEM Part No | 8K0-121-403-AC (8K0121403AC) |
| Compatible OEM Part No | 8K0-121-403-T, 8K0-121-403-Q, 8K0-121-403-H, 8K0-121-403-G, 8K0-121-403-D |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 30 vehicle configurations across 2 makes, 2013-2018.
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 30 vehicle configurations — 2 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2013 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2013 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2013 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2013 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2013 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2013 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2013 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2014 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2014 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2014 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2014 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2014 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2014 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2014 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2015 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2015 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2015 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2015 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2015 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2015 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2016 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2016 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2016 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2016 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2016 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2016 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2017 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2017 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2017 | Porsche | Macan | SUV | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CNC, CNCC, CYN, CYNA, CYNB, CYP, CYPA |
| 2018 | Porsche | Macan | SUV | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CNC, CNCC, CYN, CYNA, CYNB, CYP, CYPA |