Beck Arnley 143-0789 Engine Coolant Thermostat

Engine Coolant Thermostat for Toyota and Lexus

Beck Arnley 143-0789 is an engine coolant thermostat built to match foreign nameplate OE specifications for form, fit, and function. It is specified at 180 degrees and is a direct replacement choice for Toyota and Lexus cooling system service where original operating temperature is required.

Key Features

• 180-degree engine coolant thermostat
• Housing not included
• Gasket/seal not included
• OE-style fitment for foreign nameplate applications
• Beck Arnley part number 143-0789

Detailed Description

This thermostat is designed for vehicles that use the original equipment temperature setting, helping maintain proper coolant flow and engine operating temperature. Beck Arnley sources parts to OE specifications so the thermostat matches the required form and function for service on Lexus SC430, GX470, GS430, LS430, LX470, GS400, LS400, SC400, LX450, and Toyota 4Runner, Sequoia, Tundra, and Land Cruiser applications. Part number 143-0789 is a practical replacement when servicing the cooling system on these models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Uses

• Restoring proper engine warm-up control
• Addressing overheating caused by a thermostat stuck closed
• Correcting slow warm-up from a thermostat stuck open
• Replacing a worn thermostat during cooling system maintenance
• Returning the cooling system to the original 180-degree operating range

Installation Notes and Tips

• Verify the engine uses the original equipment 180-degree thermostat before installation.
• Housing is not included, so inspect the existing housing for wear, corrosion, or warping.
• Gasket/seal is not included; use the correct sealing components for the application.
• Drain coolant as needed and bleed the system after installation to remove trapped air.
• Confirm fitment by year, make, and model before ordering.

Quality Assurance

Beck Arnley parts are sourced to meet foreign nameplate OE specifications for form, fit, and function. Part number 143-0789 is built for direct replacement use in the listed Toyota and Lexus applications, including 2003-2009 Lexus GX470, 2003-2009 Toyota 4Runner, and 2000-2009 Toyota Tundra.

• Fits 2007-2010 Lexus SC430, N/A
• Fits 2002-2005 Lexus SC430, N/A
• Fits 2003-2009 Lexus GX470, N/A
• Fits 2003-2009 Toyota 4Runner, N/A
• Fits 2007-2009 Toyota Sequoia, N/A
• Fits 2001-2005 Toyota Sequoia, N/A
• Fits 2000-2009 Toyota Tundra, N/A
• Fits 2001-2007 Lexus GS430, N/A
• Fits 1998-2007 Lexus LX470, N/A
• Fits 1993-2007 Toyota Land Cruiser, N/A
• Fits 2001-2006 Lexus LS430, N/A
• Fits 2006 Lexus SC430, N/A
• Fits 2006 Toyota Sequoia, N/A
• Fits 1998-2000 Lexus GS400, N/A
• Fits 1998-2000 Lexus LS400, N/A
• Fits 1998-2000 Lexus SC400, N/A
• Fits 1997 Lexus LS400, N/A
• Fits 1996-1997 Lexus LX450, N/A