Rein CTI0007 Engine Coolant Thermostat

OE Thermostat Insert for Audi and Volkswagen

Rein CTI0007 is an OE quality engine coolant thermostat insert built for direct replacement service on select Audi and Volkswagen applications. It is calibrated to open at 87 degrees Celsius, helping the cooling system maintain the intended operating temperature in daily driving and under load.

Designed for vehicles such as the Audi S6, Audi S4, Audi 80, Audi 90, Audi 100, Audi 200, Audi Coupe, Audi Quattro, and Volkswagen EuroVan, this thermostat insert follows original equipment design specifications for a straightforward repair. Rein CTI0007 is also referenced by interchange number 069121113.

Key Features

• Matches original equipment design specifications
• Thermostat calibrated to 87 degrees Celsius
• Supplied with all gaskets or seals necessary for installation
• Manufactured to strict engineering standards for materials and tolerances
• Built with high-quality metal and plastic components for durability
• Direct replacement thermostat insert for select Audi and Volkswagen cooling systems

Detailed Product Overview

Rein CTI0007 is an OE-style thermostat insert engineered for consistent coolant flow control and stable engine operating temperature. The insert is manufactured to meet or exceed OE material expectations, with attention to fit, calibration, and service life. For Audi S6 and Volkswagen EuroVan thermostat replacement work, as well as Audi S4, Audi 80, Audi 90, Audi 100, Audi 200, Audi Coupe, and Audi Quattro cooling system service, this part provides a direct-fit solution that aligns with the original thermostat housing design.

This part number, CTI0007, is intended for applications where an 87C thermostat is specified. It cross-references 069121113 for the same application.

Common Problems This Part Can Address

• Engine running cooler or hotter than the specified operating range
• Delayed coolant circulation during warm-up
• Temperature fluctuation caused by a worn thermostat insert
• Cooling system service on vehicles with an 87C thermostat specification
• Replacement of a thermostat insert that no longer meets OE response standards

Installation Notes and Tips

Verify the thermostat specification and housing style before installation. Clean the sealing surfaces thoroughly and inspect the housing for wear, corrosion, or damage before fitting the new insert. Because all required gaskets or seals are supplied with the thermostat, confirm the sealing components are seated correctly during assembly. Use the vehicle service procedure and coolant refill/bleeding steps recommended for the specific Audi or Volkswagen model.

Quality Assurance

Rein manufactures this thermostat insert to OE quality standards with calibrated temperature response and durable construction materials. The brand’s OE-focused design approach supports consistent fit and performance for professional repair work and routine cooling system maintenance.