Calorstat TH7233.95J Engine Coolant Thermostat

Engine Coolant Thermostat for VW and Audi

Calorstat TH7233.95J is an engine coolant thermostat built for precise temperature control in select Volkswagen and Audi applications. It starts to open at 203.0 degrees and includes an O-ring seal, gasket or seal, and a jiggle pin weep hole for service-ready cooling system sealing.

Fits 2009-2013 Audi A3, 2009-2013 Audi A3 Quattro, 2009-2012 Audi A4, 2009-2012 Audi A4 Quattro, 2010-2011 Audi A5, 2010-2011 Audi A5 Quattro, 2011-2012 Audi Q5, 2011-2015 Audi TT Quattro, 2009-2012 Volkswagen CC, 2009-2010 Volkswagen Passat, 2009-2010 Volkswagen Passat CC, 2010-2011 Volkswagen GTI, 2013 Volkswagen Jetta, 2009-2011 Volkswagen Tiguan, 2016 Volkswagen Eos, 2016 Volkswagen Tiguan, and 2018 Volkswagen Tiguan Limited.

• Start-to-open temperature: 203.0 degrees
• Standard thermostat design with locating lug
• Gasket or seal included
• O-ring seal type with rubber seal material
• Jiggle pin weep hole for air bleeding during service
• Sealing flange outside diameter: 2.07
• Valve-seat diameter: 52.8
• By-pass valve diameter: 23.0
• Height between flanges: 1.51
• Height, by-pass side: 38.5

Detailed Application and Fitment

This Calorstat thermostat is specified for a wide range of turbocharged and naturally aspirated VW and Audi cooling systems, including Audi A3, A4, A5, Q5, TT Quattro, and Volkswagen CC, GTI, Passat, Jetta, Tiguan, and Eos. Part number TH7233.95J is also a direct reference for service searches using TH7233.95J, especially when matching OE-style cooling system components by temperature rating and housing dimensions.

This part cross-references Motorad 708-203 and Wix 46812 for the same application.

What This Thermostat Helps Address

• Engine running too cool or too hot due to thermostat sticking
• Slow warm-up after cold starts
• Temperature fluctuation from worn thermostat internals
• Coolant flow control issues in the thermostat housing circuit
• Sealing concerns at the thermostat interface

Installation Notes and Tips

Confirm the thermostat temperature rating, flange dimensions, and bypass configuration before installation. Clean the sealing surfaces thoroughly, replace the seal as supplied, and align the locating lug correctly so the thermostat seats properly in the housing. Bleed the cooling system after service to remove trapped air and verify stable operating temperature.

Quality Assurance

Calorstat is recognized as an OE supplier to Volkswagen and Audi, and this thermostat follows the dimensional and temperature specifications listed for the application. Verify vehicle fitment by year, make, model, and cooling system configuration before installation.