Beck Arnley 158-0789 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Subaru

Beck Arnley 158-0789 is an engine coolant temperature sensor built to meet foreign nameplate OE specifications for form, fit, and function. It is a direct-fit replacement for select Subaru Legacy, Forester, and Impreza applications, with fitment covering 1990-1999 Subaru Legacy, 1998 Subaru Forester, and 1993-1998 Subaru Impreza.

Key Features

• Engine coolant temperature sensor for Subaru cooling system service
• OE-style form, fit, and function for foreign nameplate applications
• Beck Arnley part number 158-0789
• Compatible with 1990-1999 Subaru Legacy, 1998 Subaru Forester, and 1993-1998 Subaru Impreza
• Built for accurate coolant temperature signal input to the engine management system

Detailed Description

When a Subaru coolant temperature sensor begins to drift or fail, the engine control system can receive incorrect temperature data and respond with poor drivability. Beck Arnley 158-0789 is engineered as an OE-spec replacement for select Subaru Legacy, Forester, and Impreza models, giving technicians a direct-fit option for restoring proper coolant temperature reporting. This part number, 158-0789, is a practical choice for Subaru Legacy cooling system repairs and Subaru Impreza engine sensor replacement work where accurate temperature feedback matters.

Beck Arnley sources parts through a global network to match the original application requirements for foreign nameplate vehicles. That focus helps ensure the sensor aligns with the intended fit and function for the listed Subaru applications.

Common Issues This Part May Resolve

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting or rough running when the engine is cold
• Rich or lean fuel control caused by faulty temperature input
• Cooling fan operation concerns tied to inaccurate sensor data
• Check engine light conditions related to coolant temperature sensor faults

Installation Notes and Tips

Verify the connector style and sensor location against the original part before installation. Inspect the cooling system for leaks, corrosion, or damaged wiring that could affect sensor performance. Clear diagnostic trouble codes after installation and confirm the repair with a scan tool or temperature reading check.

Quality Assurance

Beck Arnley parts are sourced to meet foreign nameplate OE specifications for form, fit, and function. This makes 158-0789 a dependable OE-style replacement for Subaru cooling system service.