Calorstat TH7188.95J Engine Coolant Thermostat

Engine Coolant Thermostat for Audi and Volkswagen

Calorstat TH7188.95J is a standard engine coolant thermostat built for precise coolant flow control in select Audi and Volkswagen applications. It opens at 203.0°F and includes an O-ring seal, gasket/seal, and jiggle pin weep hole for service-ready fitment in cooling system repairs.

Key Features

• Standard engine coolant thermostat for belt and cooling system service
• Start to open temperature: 203.0°F
• Includes gasket or seal and O-ring seal type
• Jiggle pin weep hole for air bleeding during cooling system fill
• Rubber seal material and rubber valve construction
• Sealing flange outside diameter: 1.61 in.
• Valve-seat diameter: 41.0 mm
• By-pass valve diameter: 37.0 mm
• Height between flanges: 1.57 in.

Detailed Description

Calorstat TH7188.95J is an engine coolant thermostat designed to regulate coolant circulation at the specified opening temperature, helping the engine reach and maintain proper operating temperature. The integrated jiggle pin weep hole supports air purging during installation and refill, while the included seal and O-ring help complete the sealing interface. This part cross-references Bosch 15462 and Gates 34782 for the same application. Use TH7188.95J when servicing cooling system temperature control on Audi A4, A4 Quattro, A5, A5 Quattro, A6, A6 Quattro, A3, A3 Quattro, Q5, TT Quattro, and Volkswagen CC, GTI, Jetta, Passat, Tiguan, Eos, Beetle, Golf, and Passat CC applications.

What It Helps Address

• Engine running too cool or taking too long to warm up
• Temperature fluctuation caused by a sticking thermostat
• Coolant flow control issues in the thermostat housing circuit
• Cooling system service needs after thermostat-related fault codes
• Seal leakage at the thermostat sealing surface

Installation Notes and Tips

Verify the thermostat dimensions, opening temperature, and seal style against the original part before installation. Clean the housing sealing surfaces thoroughly, position the O-ring correctly, and follow the vehicle manufacturer’s coolant fill and bleed procedure so the jiggle pin weep hole can assist with air removal. Fits 2009-2016 Audi A4, N/A; Fits 2009-2016 Audi A4 Quattro, N/A; Fits 2012-2014 Audi A5, N/A; Fits 2012-2017 Audi A5 Quattro, N/A; Fits 2012-2015 Audi A6, N/A; Fits 2013-2015 Audi A6 Quattro, N/A; Fits 2008-2013 Audi A3, N/A; Fits 2009-2013 Audi A3 Quattro, N/A; Fits 2011-2017 Audi Q5, N/A; Fits 2009-2015 Audi TT Quattro, N/A; Fits 2009-2017 Volkswagen CC, N/A; Fits 2008-2014 Volkswagen GTI, N/A; Fits 2008-2010 Volkswagen Jetta, N/A; Fits 2012-2013 Volkswagen Jetta, N/A; Fits 2008-2010 Volkswagen Passat, N/A; Fits 2009-2010 Volkswagen Passat CC, N/A; Fits 2009-2017 Volkswagen Tiguan, N/A; Fits 2009-2016 Volkswagen Eos, N/A; Fits 2012-2013 Volkswagen Beetle, N/A; Fits 2013 Volkswagen Golf, N/A; Fits 2015-2018 Audi Q3, N/A; Fits 2015-2018 Audi Q3 Quattro, N/A; Fits 2018 Volkswagen Tiguan Limited, N/A.

Quality Assurance

Calorstat is listed as an OE supplier to Audi and Volkswagen for the covered applications, supporting OE-style fitment expectations for this thermostat. Part number TH7188.95J is identified for direct replacement use in the specified vehicles.