OE Quality
60-Day Returns

Rein CTN0025 Engine Coolant Thermostat
Reliable Engine Coolant Thermostat for Audi, Porsche, Volkswagen
The Rein CTN0025 engine coolant thermostat is designed to meet original equipment specifications, ensuring precise temperature regulation for your vehicle. Compatible with select Audi, Porsche, and Volkswagen models, this thermostat helps maintain optimal engine performance and efficiency.
Key Features of Rein CTN0025 Thermostat
- Matches original equipment design specifications for accurate fit and function
- Includes all necessary gaskets and seals for installation
- Manufactured to strict engineering standards in Illinois
- Thermostat set to 80 degrees Celsius to maintain optimal engine temperature
- Durable black finish for corrosion resistance
Product Details and Specifications
The Rein CTN0025 thermostat insert is engineered as a direct replacement for factory-installed thermostats in vehicles such as the Audi Q7, Porsche Cayenne, Volkswagen Passat, and Volkswagen Touareg. With dimensions of 3 inches in length, 3 inches in width, and 2 inches in height, and weighing approximately 0.23 pounds, this application-specific thermostat ensures precise temperature control. The product comes packaged in a box and includes all gaskets or seals necessary for installation, although installation hardware and instructions are not included.
Compatible Vehicles and Common Applications
- Audi Q7 engine cooling system temperature regulation
- Porsche Cayenne thermostat replacement for consistent engine heat management
- Volkswagen Passat coolant thermostat for maintaining engine operating temperature
- Volkswagen Touareg engine temperature control component
Installation Notes and Tips
While the Rein CTN0025 thermostat includes all required gaskets and seals, installation hardware and instructions are not provided. It is recommended to consult a professional mechanic or refer to the vehicle’s service manual for proper installation procedures. Ensure the engine is cool before removal and replacement to avoid injury or damage.
Quality Assurance and Warranty Information
Manufactured in Illinois under strict engineering standards, the Rein CTN0025 thermostat insert is designed to meet original equipment quality. This product undergoes rigorous quality control to ensure reliable performance and durability. Warranty details should be confirmed with the distributor or manufacturer.
| Brand | Rein |
| Part Number | CTN0025 |
| Application Type | ApplicationSpecific |
| Color | Black |
| Container Type | BX |
| Country of Origin | IL |
| Installation Instructions Included | No |
| Is the Installation Hardware Included | No |
| Item Height | 2.0000 |
| Item Length | 3.0000 |
| Item Level GTIN | 888544067167 |
| Item Qty | 1 |
| Item UOM | EA |
| Item Weight | 0.2300 |
| Item Weight Unit UOM | LB |
| Item Width | 3.0000 |
| Link to Manufacturer Page | www.reinautomotive.com |
| Product Desc Extended 240 | Rein OE quality thermostat inserts are designed to be direct replacements for OE thermostat inserts. Rein thermostat inserts are manufactured with high-quality plastic or metal construction to ensure durability and long service life. |
| Product Desc Invoice 40 | Rein Thermostat Insert |
| Product Desc Long 80 | Rein OE Quality Thermostat Insert |
| Product Desc Short 20 | Thermostat Insert |
This part fits 16 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | Audi | Q7 | 3.6L | V6 | N/A | |
| 2010 | Porsche | Cayenne | 3.6L | V6 | N/A | |
| 2010 | Volkswagen | Passat | 3.6L | V6 | N/A | |
| 2010 | Volkswagen | Touareg | 3.6L | V6 | N/A | |
| 2009 | Audi | Q7 | 3.6L | V6 | N/A | |
| 2009 | Porsche | Cayenne | 3.6L | V6 | N/A | |
| 2009 | Volkswagen | Passat | 3.6L | V6 | N/A | |
| 2009 | Volkswagen | Touareg | 3.6L | V6 | N/A | |
| 2008 | Audi | Q7 | 3.6L | V6 | N/A | |
| 2008 | Porsche | Cayenne | 3.6L | V6 | N/A | |
| 2008 | Volkswagen | Passat | 3.6L | V6 | N/A | |
| 2008 | Volkswagen | Touareg | 3.6L | V6 | N/A | |
| 2007 | Audi | Q7 | 3.6L | V6 | N/A | |
| 2007 | Volkswagen | Passat | 3.6L | V6 | N/A | |
| 2007 | Volkswagen | Touareg | 3.6L | V6 | N/A | |
| 2006 | Volkswagen | Passat | 3.6L | V6 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.