NTK 21060 Oxygen Sensor - Downstream Left

Direct Fit Oxygen Sensor

NTK 21060 is a direct fit heated oxygen sensor built for specific applications and engineered to match OE fit, form, and function. It is a threaded sensor with a 4-wire design and a 15-inch harness for a precise replacement on supported vehicles.

Key Features

• Heated oxygen sensor for faster operating response.
• Specific-fit design for direct replacement applications.
• 4-wire configuration with a 15-inch wiring harness.
• 18 mm threaded mounting style for proper installation.
• Extensively tested during manufacturing for quality and reliability.

Detailed Description

NTK 21060 is part of NTK's Direct Fit Oxygen Sensor line, created to streamline replacement selection while maintaining OE-level application coverage. As a sensor specialist within the NGK family, NTK applies ceramic manufacturing expertise and OE application technology to oxygen sensors that are built for accurate fitment and dependable signal performance. This part cross-references Bosch 15150 and DENSO Auto Parts 234-4246 for the same application. Compatible with 2008-2009 Chevrolet Trailblazer, downstream left; 2008-2009 GMC Envoy, downstream left; and 2008-2009 Saab 9-7x, downstream left. The NTK 21060 is a practical replacement choice for emissions service on the Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x when the original downstream left sensor needs attention.

What It Is Used For

• Replacing a worn or failed downstream oxygen sensor.
• Restoring proper exhaust feedback for engine management.
• Addressing sensor-related fault codes and emissions warnings.
• Correcting drivability issues tied to inaccurate oxygen readings.
• Maintaining emissions system performance on supported vehicles.

Installation Notes and Tips

Verify the connector, wire count, thread size, and downstream left location before installation. Use the vehicle's service information to confirm the correct sensor position and routing for the harness. Because this is a specific-fit oxygen sensor, it should be matched to the exact application listed in the fitment data.

Quality Assurance

NTK states that these oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. The brand is known for original equipment oxygen sensor production and OE application support.