Beck Arnley 143-0971 Engine Coolant Thermostat

OE Quality 60-Day Returns

Beck Arnley 143-0971 Engine Coolant Thermostat

Brand	Beck Arnley 143-0971
TEMPERATURE	180
Fits	Lexus · 29 vehicles

OE-spec replacement. Built to match form, fit, and function requirements.

Engine coolant thermostat. Helps regulate coolant flow for proper engine temperature control.

$35.17Free shipping

In stock · usually ships same day before 1pm CST

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180°F Thermostat for Lexus Cooling Control

The Beck Arnley 143-0971 engine coolant thermostat is a 180°F unit built to meet foreign nameplate OE specifications for form, fit, and function. It is a direct-fit cooling system service part for select Lexus models, including Lexus IS300, RC300, NX300, GS300, GS200t, IS200t, NX200t, and RC200t applications.

Key Features

180°F thermostat temperature rating for controlled engine warm-up and coolant regulation
OE-style fitment for foreign nameplate applications
Engineered for the outer thermostat location on listed Lexus turbo and non-turbo models
Beck Arnley part number 143-0971 for accurate ordering and service matching
Built using global sourcing support to match the required application

Application Details

Beck Arnley 143-0971 is a thermostat for Lexus cooling systems where the factory specification calls for 82C/180F operation. It fits 2023-2024 Lexus IS300, 2022-2024 Lexus RC300, 2018-2022 Lexus IS300, 2018-2021 Lexus NX300, 2018-2021 Lexus RC300, 2018-2019 Lexus GS300, 2016-2017 Lexus GS200t, 2016-2017 Lexus IS200t, 2015-2017 Lexus NX200t, and 2016-2017 Lexus RC200t. In the listed applications, the thermostat installs in the outer position toward the lower radiator coolant hose.

What This Thermostat Helps Address

Engine running too cool or taking too long to reach operating temperature
Temperature fluctuation caused by a worn thermostat
Cooling system service on Lexus IS300, RC300, NX300, and related models
Incorrect thermostat temperature specification during replacement
Restoring proper coolant flow control in the outer thermostat location

Installation Notes

Verify the OE temperature specification before installation and confirm the outer thermostat location toward the lower radiator coolant hose on the vehicle. Inspect the cooling system for contamination, hose condition, and sealing surfaces before reassembly. For best results, follow the factory service procedure for coolant refill and air bleeding after replacement.

Quality Assurance

Beck Arnley parts are sourced to meet foreign nameplate OE specifications for form, fit, and function. Part number 143-0971 is supported by Beck Arnley’s global sourcing network to help ensure the correct application match for Lexus cooling system service.

This part fits 29 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2024	Lexus	IS300	2.0L	L4	N/A	TEMPERATURE 82C/180F
2024	Lexus	RC300	2.0L	L4	N/A	TEMPERATURE 82C/180F
2023	Lexus	IS300	2.0L	L4	N/A	TEMPERATURE 82C/180F
2023	Lexus	RC300	2.0L	L4	N/A	TEMPERATURE 82C/180F
2022	Lexus	IS300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2022	Lexus	RC300	2.0L	L4	N/A	TEMPERATURE 82C/180F
2021	Lexus	IS300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2021	Lexus	NX300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2021	Lexus	RC300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2020	Lexus	IS300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2020	Lexus	NX300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2020	Lexus	RC300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2019	Lexus	GS300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2019	Lexus	IS300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2019	Lexus	NX300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2019	Lexus	RC300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2018	Lexus	GS300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2018	Lexus	IS300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2018	Lexus	NX300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2018	Lexus	RC300	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2017	Lexus	GS200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2017	Lexus	IS200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2017	Lexus	NX200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2017	Lexus	RC200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2016	Lexus	GS200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2016	Lexus	IS200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2016	Lexus	NX200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2016	Lexus	RC200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
2015	Lexus	NX200t	2.0L	L4	N/A	Outer (Toward Lower Radiator Coolant Hose); TEMPERATURE 180
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