Calorstat TH7274.87 Engine Coolant Thermostat

Engine Coolant Thermostat for VW and Audi

Calorstat TH7274.87 is a standard engine coolant thermostat built for precise coolant flow control in select Volkswagen and Audi applications. It opens at 188.0°F and uses OE-style dimensions for the sealing flange, bypass valve, and valve seat to support proper cooling system operation.

Compatible with 2013-2021 Volkswagen Jetta, 2015-2016 Volkswagen Golf, 2018-2021 Volkswagen Golf, 2019 Volkswagen Golf SportWagen, 2013-2014 Audi A3, 2016-2018 Audi A3 Sportback e-tron, 2017-2019 Audi A3, 2016-2018 Audi Q3, and 2018-2019 Audi Q2. Calorstat TH7274.87 is also cross-referenced to Dorman - HELP 15628 for the same application.

• Standard engine coolant thermostat
• Start-to-open temperature: 188.0°F
• Sealing flange outside diameter: 1.29 in.
• By-pass valve diameter: 41.7 mm
• Valve-seat diameter: 33.0 mm
• Gasket or seal not included

Detailed Product Overview

This thermostat regulates coolant circulation based on engine temperature, helping the cooling system maintain stable operating conditions. The OE-supplier fitment coverage for Volkswagen and Audi applications makes TH7274.87 a direct-match service part for vehicles that require this thermostat specification. The Calorstat TH7274.87 part number is useful when replacing a worn thermostat in a VW Jetta, VW Golf, Audi A3, or Audi Q3 cooling system.

Common Cooling System Issues

• Engine running too cool or too warm
• Delayed coolant flow regulation after startup
• Temperature fluctuation during normal driving
• Cooling system fault codes related to thermostat performance
• Reduced heater output caused by improper coolant temperature control

Installation Notes and Tips

Verify the thermostat housing and sealing surfaces before installation. Because the gasket or seal is not included, match the required seal separately before service. Confirm the OE part number and cooling system specification for your exact Volkswagen or Audi model before replacing the thermostat.

Quality Assurance

Calorstat is listed as an OE supplier to Volkswagen and Audi for these applications, supporting OE-style fitment and specification alignment for TH7274.87.