Standard Ignition TX157 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor Overview

Standard Ignition TX157 is an engine coolant temperature sensor built for direct replacement in select Subaru and Scion applications. It uses a bolt-on attachment, a rectangular plug-in connector, and a 2-blade terminal layout for straightforward OE-style service.

Compatible With 2004-2014 Subaru Outback, 2005-2014 Subaru Legacy, 2009-2012 Subaru Forester, 2008-2012 Subaru Impreza, 2008-2012 Subaru Tribeca, 2012 Subaru WRX, 2006-2008 Subaru Forester with 2 terminal fitment, 2006-2007 Subaru B9 Tribeca, 2006-2007 Subaru Impreza with 2 terminal fitment, and 2013 Scion FR-S. Standard Ignition TX157 is a practical choice when replacing a faulty coolant temperature sensor on Subaru Legacy, Outback, or Forester models.

Key Features

• Bolt-on attachment method for secure installation
• Female rectangular connector with plug-in design
• 2 male blade terminals for OE-style electrical connection
• Direct replacement format for select Subaru and Scion vehicles
• Cross-reference part numbers include 22630AA140 and SU00300420

Detailed Description

The TX157 engine coolant temperature sensor monitors coolant temperature so the engine control system can manage fuel delivery, idle strategy, and temperature-related operation. Standard Ignition TX157 is specified with a female connector, rectangular housing, and blade terminals to match the original connection style on supported vehicles. For buyers searching for a Subaru coolant temperature sensor replacement, this part number is commonly used across Legacy, Outback, Forester, Impreza, Tribeca, WRX, and FR-S applications.

Common Replacement Reasons

• Check engine light related to coolant temperature sensor performance
• Hard starting or rough running when the engine is cold
• Incorrect temperature gauge or temperature signal readings
• Fuel mixture or idle concerns tied to coolant temperature input
• Corrosion, damage, or connector wear at the original sensor

Installation Notes and Tips

Verify connector shape, terminal count, and fitment before installation. This part uses a bolt-on mounting style and a plug-in rectangular connector, so the original sensor location and harness style should be matched carefully. For 2006-2008 Subaru Forester and 2006-2007 Subaru Impreza applications, confirm the 2 terminal fitment noted in the vehicle listing. On the 2013 Scion FR-S, prior to purchase, ensure compatibility with the vehicle's alternator for proper fit.

Quality Assurance

Standard Ignition TX157 is built as an OE-style replacement sensor for supported applications and is backed by Standard Ignition brand manufacturing standards.