Standard Ignition TX238 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Subaru and Toyota

Standard Ignition TX238 is an engine coolant temperature sensor built for direct replacement in a range of Subaru and Toyota applications. It uses a bolt-on attachment method with a single plug-in connector, making it a practical choice for service work on vehicles such as the Subaru Forester, Legacy, WRX, BRZ, and Toyota 86.

Key Features

• Engine coolant temperature sensor for cooling system signal input
• Bolt-on attachment method
• 1 female square plug-in connector
• 2 male blade terminals
• 1 port with NPT thread type
• Black and bronze finish with brass and plastic construction
• Standard Ignition TX238 replacement part

Detailed Description

The Standard Ignition TX238 coolant temperature sensor monitors engine coolant temperature and sends that information to the vehicle control system. Accurate coolant temperature input is important for fuel delivery, idle quality, cooling fan operation, and temperature-related engine management. This part cross-references Walker Products 211-2030 and Walker Exhaust 74033 for the same application. Compatible With Subaru Forester, Legacy, WRX, WRX STI, BRZ, Outback, Crosstrek, Impreza, XV Crosstrek, Tribeca, and Toyota 86 applications across the listed model years.

What It Helps Address

• Incorrect coolant temperature readings
• Check engine light concerns related to temperature sensor input
• Hard starting or rough idle when the engine is cold or warm
• Cooling fan control issues tied to sensor data
• Fuel mixture problems caused by inaccurate temperature feedback

Installation Notes and Tips

Verify connector shape, terminal style, and thread type before installation. The TX238 uses a female square connector, male blade terminals, and NPT threads, so matching the original sensor configuration is important for proper fitment. Confirm the vehicle application by year and model before service, especially on Subaru Forester, Legacy, WRX, and BRZ platforms.

Quality Assurance

Standard Ignition supplies replacement electrical and engine management components for service applications. TX238 is built with brass and plastic materials and a bolt-on mounting style to match the listed vehicle requirements.