Beck Arnley 143-0951 Engine Coolant Thermostat

OE-Style Coolant Control for Subaru Engines

Beck Arnley 143-0951 is an engine coolant thermostat built to meet foreign nameplate OE specifications for form, fit, and function. It is a direct-fit cooling system service part for Subaru Ascent, Legacy, Outback, WRX, and Forester applications with the specified 190°F operating temperature.

For drivers searching for a Subaru WRX thermostat 190F replacement or a Beck Arnley 143-0951 thermostat for Subaru Forester cooling service, this part supports accurate coolant temperature regulation and OE-style fitment.

• Engine coolant thermostat for Subaru cooling system service
• 190°F temperature rating for specified OE applications
• Built to match foreign nameplate OE specifications
• Form, fit, and function aligned with original equipment requirements
• Fits 2014-2018 Subaru Forester, N/A
• Fits 2015-2020 Subaru WRX, N/A
• Fits 2019-2020 Subaru Ascent, N/A
• Fits 2020 Subaru Legacy, N/A
• Fits 2020 Subaru Outback, N/A
• Fits 2021-2023 Subaru Ascent, N/A

Detailed Fitment and Application

Beck Arnley 143-0951 is specified for Subaru cooling systems that call for a 190°F thermostat, including 2014-2018 Subaru Forester, 2015-2020 Subaru WRX, 2019-2020 Subaru Ascent, 2020 Subaru Legacy, 2020 Subaru Outback, and 2021-2023 Subaru Ascent. The part number 143-0951 is a practical match for owners replacing a thermostat during routine cooling system repair or temperature-related service on these Subaru models.

This part cross-references no listed interchange numbers in the provided data.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant flow regulation during warm-up
• Temperature control issues in Subaru cooling system service
• Replacement of an OE-spec thermostat at the specified 190°F rating

Installation Notes and Tips

Verify the original thermostat temperature rating before installation and confirm the application against your vehicle’s cooling system specifications. Inspect the thermostat housing, gasket surfaces, and coolant condition during service, and bleed the cooling system carefully after installation to remove trapped air.

Quality Assurance

Beck Arnley sources parts through a global network focused on foreign nameplate applications, with product specifications selected to match OE requirements for fit and function. The part number 143-0951 is built for the listed Subaru applications and temperature specification.