Calorstat TH5973.71J Engine Coolant Thermostat

Engine Coolant Thermostat for Volkswagen Cooling Systems

Calorstat TH5973.71J is a standard engine coolant thermostat built for Volkswagen cooling system service. It opens at 160°F (71°C) and includes an O-ring seal for a direct-fit thermostat and housing repair on select Golf, Jetta, EuroVan, Passat, and Corrado applications.

Key Features

• Standard engine coolant thermostat for temperature regulation
• Start-to-open temperature: 160.0°F / 71°C
• Includes gasket or seal with rubber O-ring seal type
• Sealing flange outside diameter: 2.63 in.
• Height between flanges: 1 in.
• Calorstat TH5973.71J for Volkswagen cooling system maintenance

Detailed Description

This Calorstat engine coolant thermostat helps control coolant flow so the engine reaches and maintains the correct operating temperature. The TH5973.71J uses a standard design with an included rubber O-ring seal, making it a practical replacement for thermostat service on Volkswagen Golf, Volkswagen Jetta, Volkswagen EuroVan, Volkswagen Passat, and Volkswagen Corrado models listed below. This part cross-references 075121113 and 076121113A for the same application.

Compatible With: Fits 1995-2005 Volkswagen Golf, N/A; Fits 1994-2004 Volkswagen Jetta, N/A; Fits 1999-2003 Volkswagen EuroVan, N/A; Fits 1997 Volkswagen EuroVan, N/A; Fits 1993-1997 Volkswagen Passat, N/A; Fits 1992-1994 Volkswagen Corrado, N/A.

What It Helps Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuation caused by a worn thermostat
• Coolant flow control issues in the thermostat housing
• Maintenance replacement for aging Volkswagen cooling system components
• Seal-related leaks at the thermostat interface

Installation Notes and Tips

Verify the thermostat opening temperature and housing dimensions before installation. Clean the sealing surface thoroughly and replace the thermostat with the included O-ring seal in place. Confirm the application against your vehicle’s engine code and cooling system configuration for Volkswagen Golf, Jetta, EuroVan, Passat, or Corrado service.

Quality Assurance

Calorstat TH5973.71J is built as a standard replacement thermostat with application-specific fitment data and OE-style cross-reference coverage for Volkswagen cooling system repair.