Standard Ignition TX84 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Subaru

Standard Ignition TX84 is an engine coolant temperature sensor built for direct replacement service on select Subaru applications. It uses a screw-on attachment, a rectangular plug-in connector, and a brass sensing body to support accurate coolant temperature signal transfer in the engine cooling system.

Key Features

• Engine coolant temperature sensor for cooling system temperature monitoring
• Screw-on attachment method for secure installation
• Rectangular female connector with plug-in style connection
• Brass sensor body with black and gold finish details
• 12-volt electrical specification
• Male blade terminals with 2-terminal design
• Standard Ignition TX84 replacement part number

Detailed Description

Standard Ignition TX84 is an engine coolant temperature sensor used to report coolant temperature data to the vehicle control system. Accurate temperature input is important for fuel delivery, idle quality, and cooling fan operation. This sensor is built with a brass material construction, a female rectangular connector, and a screw-on mounting style for Subaru cooling system applications. It cross-references Subaru 22630AA040 and aftermarket numbers SU4258 and TS5609 for the same application. Compatible With Subaru Impreza, Subaru Legacy, and Subaru Forester applications listed below, TX84 supports service replacement where the original sensor uses the same connector and terminal configuration.

Vehicle Fitment

• Fits 1993-1999 Subaru Impreza, N/A
• Fits 1990-1999 Subaru Legacy, N/A
• Fits 1998 Subaru Forester, N/A

Common Issues Addressed

• Incorrect coolant temperature signal to the engine control system
• Hard starting or rough idle related to temperature input errors
• Cooling fan operation problems caused by faulty temperature reporting
• Check engine light conditions tied to coolant temperature sensor failure
• Poor fuel mixture control when the sensor signal is out of range

Installation Notes and Tips

Verify connector shape, terminal count, and screw-on mounting style before installation. Inspect the harness plug and terminal condition for corrosion or looseness, and confirm the replacement sensor matches the original electrical connection. For Subaru Impreza, Subaru Legacy, and Subaru Forester applications, compare the old unit to TX84 before removal to ensure the correct thread and connector style are being used.

Quality Assurance

Standard Ignition supplies replacement electrical components for service applications, and TX84 is built to match the listed fitment and connection requirements for the vehicles shown.