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Rein CTA0021 Engine Coolant Thermostat Housing Assembly
| Brand | Rein CTA0021 |
|---|---|
| Application Type | ApplicationSpecific |
| Container Type | BX |
| Country of Origin | CN |
| Item Height | 5.7500 |
| Item Length | 5.5000 |
| Item Level GTIN | 843266081990 |
| Item Qty | 1 |
| Item UOM | EA |
| Item Weight | 0.9850 |
| Item Weight Unit UOM | LB |
| Item Width | 5.5000 |
| 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 Assembly |
| Product Desc Long 80 | Rein OE Quality Thermostat Assembly |
| Product Desc Short 20 | Thermostat Assembly |
| Fits | Audi · 9 vehicles |
OE quality assembly. Matches original equipment design specs for a direct fit.
Precision-calibrated thermostat. Set to 100°C for consistent cooling system response.
Durable construction. Made with high-quality metal or plastic components.
Cross-references URO 06B121111K, 06B121111D and 06B121111G for the same application. See all 4.
OE Quality Thermostat Housing Assembly
Rein CTA0021 is an OE quality engine coolant thermostat housing assembly built for direct replacement service. It is engineered to match original equipment design specifications and temperature-calibrated to 100 degrees Celsius for consistent cooling system control in Audi A4 and Audi A4 Quattro applications.
Fits 2002-2006 Audi A4 and 2002-2005 Audi A4 Quattro. This Rein thermostat assembly is designed around vehicle-specific factory requirements, with housing construction that follows OEM material and tolerance needs for a smooth installation and proper fit.
Key Features
- Matches original equipment design specifications
- Direct fitment for easier installation
- Manufactured to strict engineering standards for materials and tolerances
- Thermostat calibrated to 100 degrees Celsius
- OE-style housing construction based on vehicle requirements
- Rein CTA0021 thermostat housing assembly for cooling system service
Detailed Description
Rein Automotive OE quality thermostat assemblies are built to replace the original thermostat housing assembly with the same general fit, form, and function expected from factory equipment. The housing design is based on OEM parts and produced to meet strict dimensional requirements, helping ensure proper alignment during installation. Rein CTA0021 is intended for Audi A4 and Audi A4 Quattro models listed in the fitment data, and it uses quality materials selected for durability and service life in the engine cooling system.
This part cross-references URO 06B121111K for the same application.
Common Cooling System Issues Addressed
- Coolant temperature that stays too low or rises inconsistently
- Thermostat housing leakage at the cooling system connection
- Fitment problems caused by worn or damaged original housing components
- Delayed engine warm-up in Audi A4 and Audi A4 Quattro cooling systems
- Service replacement for a failed thermostat assembly
Installation Notes and Tips
Verify the part number CTA0021 against the vehicle application before installation. Confirm the engine cooling system is fully drained and inspect mating surfaces, seals, and related hoses for wear or damage before reassembly. Because this is an application-specific thermostat housing assembly, correct vehicle identification is important for proper fit on 2002-2006 Audi A4 and 2002-2005 Audi A4 Quattro models.
Quality Assurance
Rein designs these thermostat assemblies to meet or exceed OE material expectations and factory tolerance requirements. The housing is produced from OEM-based molds, and the thermostat is temperature calibrated for consistent response in cooling system operation. Rein CTA0021 is built as an OE quality replacement for Audi cooling system service.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Audi | A4 | 1.8L | L4 | N/A | — |
| 2005 | Audi | A4 | 1.8L | L4 | N/A | — |
| 2005 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| 2004 | Audi | A4 | 1.8L | L4 | N/A | — |
| 2004 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| 2003 | Audi | A4 | 1.8L | L4 | N/A | — |
| 2003 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| 2002 | Audi | A4 | 1.8L | L4 | N/A | — |
| 2002 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| No rows match your filter. | ||||||