NTK EF0149 Engine Coolant Temperature Sensor

NTK Engine Coolant Temperature Sensor EF0149

NTK EF0149 is an engine coolant temperature sensor built for accurate temperature reporting to the engine management system. It uses a 2-terminal blade design with an oblong female connector and includes the wiring harness for a direct-fit service replacement.

Compatible with select Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, Saab 9-7x, and related applications, this NTK Engine Coolant Temperature Sensor supports reliable coolant temperature input for drivability and emissions control. The EF0149 part number is also a useful reference when cross-shopping OE-style replacements.

Key Features

• NTK Engine Coolant Temperature Sensor, part number EF0149
• 2-terminal blade connection with oblong female connector
• Wiring harness included for service replacement
• Built to meet or exceed OE specifications
• Tested under thermal shock, vibration, and OBD verification conditions
• Backed by NTK’s OE sensor experience for import and domestic coverage

Product Details

NTK focuses on technical sensors across import and domestic vehicle platforms, and the EF0149 follows that OE-driven approach. This sensor is engineered to provide dependable coolant temperature feedback, which the powertrain control system uses to manage fuel delivery, idle strategy, and cooling fan operation. If you are replacing a failing coolant temp sensor on a Chevrolet Trailblazer, GMC Envoy, or Buick Rainier, EF0149 offers a direct-fit option with the correct connector style and terminal layout.

This part cross-references Standard Ignition TX108 for the same application.

What This Sensor Helps Address

• Incorrect coolant temperature readings sent to the ECU
• Hard starting or rough cold operation caused by faulty temperature input
• Cooling fan behavior affected by inaccurate sensor data
• Check engine light concerns related to coolant temperature circuit faults
• Fuel mixture and idle issues tied to a degraded ECT sensor

Installation Notes and Tips

Verify connector shape, terminal count, and harness style before installation. The EF0149 uses a female oblong connector with blade terminals, so matching the electrical interface is important for proper fitment. Confirm the vehicle application against the listed model years before replacing the sensor, and inspect the cooling system for leaks or contamination that could affect sensor performance.

Fits 2004-2005 Buick Rainier, N/A. Fits 2002-2005 Chevrolet Trailblazer, N/A. Fits 2002-2005 Chevrolet Trailblazer EXT, N/A. Fits 2002-2005 GMC Envoy, N/A. Fits 2002-2005 GMC Envoy XL, N/A. Fits 2004-2005 GMC Envoy XUV, N/A. Fits 2003-2005 Isuzu Ascender, N/A. Fits 2005 Saab 9-7x, N/A. Fits 2002-2004 Oldsmobile Bravada, N/A.

Quality Assurance

NTK manufactures this sensor to meet or exceed OE specifications and validates it through thermal shock, vibration, and OBD verification testing. As part of NTK’s technical sensor line, EF0149 reflects the brand’s OE-focused engineering for dependable aftermarket service.