NTK 21054 Oxygen Sensor - Upstream

Overview of NTK Direct Fit Oxygen Sensor 21054

The NTK Direct Fit Oxygen Sensor 21054 is designed for precise emission control in select GM and Isuzu vehicles. This heated oxygen sensor offers a specific fit for models like the Chevrolet Trailblazer and GMC Envoy, ensuring reliable performance and accurate air-fuel mixture readings.

• Heated oxygen sensor for faster response times
• Specific fit for Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab models
• Threaded mounting type with 18mm thread diameter
• 18.75-inch wiring harness length with 4 wires for secure connections
• Part number 21054 for easy identification and replacement

Detailed Product Features and Specifications

The NTK Direct Fit Oxygen Sensor 21054 is engineered with a heated sensor element to provide quicker warm-up and improved sensor response. Its 18.75-inch wiring harness length allows for proper routing and connection within the engine bay. The sensor features a threaded mounting type with an 18mm thread diameter, ensuring a secure and leak-free installation. With four wires, this sensor supports both the heater circuit and signal transmission for accurate oxygen level monitoring. This oxygen sensor is a specific fit, designed to match the OEM specifications for vehicles including the Buick Rainier, Chevrolet Colorado, GMC Canyon, Isuzu Ascender, Oldsmobile Bravada, and Saab 9-7x.

About the Direct Fit Oxygen Sensor Product Line

The NTK Direct Fit Oxygen Sensor line focuses on providing exact replacement sensors that meet original equipment specifications. These sensors are designed for direct installation without modification, maintaining factory performance and emission standards. The Direct Fit Oxygen Sensor 21054 is part of this line, offering a precise fit and reliable operation for the listed GM and Isuzu models.

Common Applications and Issues Addressed

• Restores proper air-fuel ratio readings for improved engine efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce vehicle emissions by ensuring accurate sensor data
• Prevents rough idling and poor fuel economy caused by faulty sensors
• Supports proper catalytic converter function by monitoring exhaust gases

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use an oxygen sensor socket or appropriate tool for removal and installation
• Do not over-tighten; torque to manufacturer specifications for the 18mm threaded sensor
• Check wiring harness length (18.75 inches) for proper routing and connection
• Verify compatibility with vehicle make and model before installation

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet strict quality standards for durability and performance. The Direct Fit Oxygen Sensor 21054 undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship to support long-term use.