Beck Arnley 143-0710 Engine Coolant Thermostat

Engine Coolant Thermostat for Subaru Applications

Beck Arnley 143-0710 is an engine coolant thermostat built to meet foreign nameplate OE specifications for form, fit, and function. It is specified at 170 degrees and includes the gasket/seal, with the housing not included. This thermostat is a direct-fit choice for Subaru cooling system service on Legacy, Outback, Forester, Impreza, Tribeca, Baja, and WRX STI applications.

Key Features

• 170-degree thermostat specification for OE-style engine temperature control
• Includes gasket/seal for service-ready installation
• Housing not included
• Built to Beck Arnley foreign nameplate OE specifications
• Part number 143-0710 for accurate ordering and fitment lookup

Fitment Details

• Fits 1990-2015 Subaru Legacy, N/A; original equipment temperature; includes gasket/seal; temperature 170
• Fits 2000-2017 Subaru Outback, N/A; original equipment temperature; includes gasket/seal; temperature 170
• Fits 1998-2013 Subaru Forester, N/A; original equipment temperature; includes gasket/seal; temperature 170
• Fits 1993-2011 Subaru Impreza, N/A; original equipment temperature; includes gasket/seal; temperature 170
• Fits 2008-2014 Subaru Tribeca, N/A; original equipment temperature; includes gasket/seal; temperature 170
• Fits 2006-2007 Subaru B9 Tribeca, N/A; original equipment temperature; includes gasket/seal; temperature 170
• Fits 2003-2006 Subaru Baja, N/A; original equipment temperature; includes gasket/seal; temperature 170
• Fits 2015 Subaru WRX STI, N/A; original equipment temperature; includes gasket/seal; temperature 170

What This Thermostat Helps Address

• Engine running too cool or too warm due to thermostat wear
• Slow warm-up after cold starts
• Temperature fluctuation from a sticking thermostat
• Cooling system service on Subaru Legacy, Outback, Forester, and Impreza models
• Replacement of a thermostat that no longer opens at the correct temperature

Installation Notes and Tips

Verify the thermostat housing condition before installation, since the housing is not included. Replace the gasket/seal during service and confirm the cooling system is properly filled and bled after installation. For Subaru Legacy, Outback, Forester, Impreza, Tribeca, Baja, and WRX STI applications, confirm the original equipment temperature specification matches the vehicle before ordering Beck Arnley 143-0710.

Quality Assurance

Beck Arnley sources parts to foreign nameplate OE specifications for form, fit, and function, and works with global sourcing partners to help ensure the correct replacement part is selected for the application. Part number 143-0710 is identified for accurate catalog matching and service reference.