Audi / Porsche / Volkswagen Thermostat Housing / Cover 03H121121C
OEM Part #: 03H-121-121-C (03H121121C)
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:
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Thermostat Housing
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This genuine OEM thermostat housing cover (part number 03H121121C) is integral for effective engine temperature regulation in vehicles. Sourced from late-model donor cars, this authentic component is designed to fit the 2007-2011 Audi Q7 (3.6L V6), 2006-2011 Volkswagen Passat (3.6L V6), and 2007-2011 Volkswagen Touareg models. Commonly referred to as the thermostat outlet, it connects the thermostat to the engine block, facilitating coolant flow and ensuring optimal engine performance. Replacing worn or damaged housing can remedy overheating issues and leaks, restoring your vehicle's functionality. Secure your engine's efficiency with this factory-original piece, also compatible with alternative part numbers such as 03H121113D and WHT000863.
Specifications
| Fits Vehicle Model | Atlas, Atlas Cross Sport, Cayenne, CC, Passat, Q7, Touareg |
| Fits Vehicle Make | Audi, Porsche, Volkswagen |
| OEM Part No | 03H-121-121-C (03H121121C) |
| Compatible OEM Part No | 03H-121-121-D |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 53 vehicle configurations across 3 makes, 2006-2023.
View all 53 vehicle configurations — 8 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2007 | Audi | Q7 | SUV | 3.6L V6 | |
| 2008 | Audi | Q7 | SUV | 3.6L V6 | |
| 2009 | Audi | Q7 | SUV | 3.6L V6 | |
| 2010 | Audi | Q7 | SUV | 3.6L V6 | |
| 2008 | Porsche | Cayenne | SUV | 3.6L V6 | |
| 2009 | Porsche | Cayenne | SUV | 3.6L V6 | |
| 2010 | Porsche | Cayenne | SUV | 3.6L V6 | |
| 2006 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2007 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2007 | Volkswagen | Passat | Wagon | 3.6L V6 | |
| 2007 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2008 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2008 | Volkswagen | Passat | Wagon | 3.6L V6 | |
| 2008 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2009 | Volkswagen | CC | 4Motion Sedan | 3.6L V6 | For Vehicles With Production date Up To 08/01/10 |
| 2009 | Volkswagen | CC | Sedan | 3.6L V6 | For Vehicles With Production date Up To 08/01/10 |
| 2009 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2010 | Volkswagen | CC | 4Motion Sedan | 3.6L V6 | For Vehicles With Production date Up To 08/01/10 |
| 2010 | Volkswagen | CC | Sedan | 3.6L V6 | For Vehicles With Production date Up To 08/01/10 |
| 2010 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2011 | Volkswagen | CC | 4Motion Sedan | 3.6L V6 | For Vehicles With Production date Up To 08/01/10 |
| 2011 | Volkswagen | Touareg | SUV | 3.6L V6 | For Vehicles With Production date Up To 08/01/10 |
| 2012 | Volkswagen | CC | Sedan | 3.6L V6 | For Vehicles with Production Date After 08/02/10 |
| 2012 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2012 | Volkswagen | Touareg | SUV | 3.6L V6 | For Vehicles with Production Date After 08/02/10 |
| 2013 | Volkswagen | CC | Sedan | 3.6L V6 | |
| 2013 | Volkswagen | CC | 4Motion Sedan | 3.6L V6 | |
| 2013 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2013 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2014 | Volkswagen | CC | 4 Sedan | 3.6L V6 | |
| 2014 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2014 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2015 | Volkswagen | CC | 4 Sedan | 3.6L V6 | |
| 2015 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2015 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2016 | Volkswagen | CC | 4Motion Sedan | 3.6L V6 | |
| 2016 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2016 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2017 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2017 | Volkswagen | Touareg | SUV | 3.6L V6 | |
| 2018 | Volkswagen | Atlas | SUV | 3.6L V6 | |
| 2018 | Volkswagen | Passat | GT Sedan | 3.6L V6 | |
| 2018 | Volkswagen | Passat | Sedan | 3.6L V6 | |
| 2019 | Volkswagen | Atlas | SUV | 3.6L V6 | |
| 2020 | Volkswagen | Atlas | SUV | 3.6L V6 | |
| 2020 | Volkswagen | Atlas Cross Sport | SUV | 3.6L V6 | |
| 2021 | Volkswagen | Atlas | SUV | 3.6L V6 | |
| 2021 | Volkswagen | Atlas Cross Sport | SUV | 3.6L V6 | |
| 2022 | Volkswagen | Atlas | SUV | 3.6L V6 | |
| 2022 | Volkswagen | Atlas Cross Sport | SUV | 3.6L V6 | |
| 2022 | Volkswagen | Atlas Cross Sport | SUV | 2.0L l4 Turbo | |
| 2023 | Volkswagen | Atlas | SUV | 3.6L V6 | |
| 2023 | Volkswagen | Atlas Cross Sport | SUV | 3.6L V6 |