NTK 21549 Oxygen Sensor

Overview of NTK Direct Fit Oxygen Sensor 21549

The NTK Direct Fit Oxygen Sensor 21549 is engineered for precise emission control in select GM vehicles. Designed as a heated oxygen sensor with a specific fit, it ensures accurate air-fuel mixture readings for optimal engine performance and reduced emissions.

• Heated oxygen sensor type for faster response times
• Specific fit for select Cadillac, Chevrolet, GMC, and Hummer models
• 15-inch wiring harness length for convenient installation
• Threaded mounting type with 18mm thread diameter
• Four-wire configuration for reliable signal transmission

Detailed Product Description

This NTK oxygen sensor, part number 21549, belongs to the Direct Fit Oxygen Sensor line, which focuses on providing exact replacement sensors tailored to vehicle-specific requirements. The heated sensor design allows quicker activation, improving fuel efficiency and emissions control shortly after engine start. With a 15-inch wiring harness and four wires, this sensor integrates seamlessly with the vehicle’s existing wiring harness, minimizing installation complexity. The threaded mounting type with an 18mm diameter ensures a secure and proper fit in the exhaust system.

Compatible Vehicles and Applications

This oxygen sensor is compatible with a range of GM vehicles, including Cadillac Escalade, Chevrolet Silverado 1500, GMC Sierra 2500 HD, and Hummer H2 models. It is designed to meet the exact specifications required for these vehicles, ensuring proper function and emission compliance.

• Helps resolve issues with poor fuel economy
• Addresses rough engine idle and hesitation
• Reduces excessive exhaust emissions
• Prevents check engine light related to oxygen sensor faults
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the NTK 21549 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. The 15-inch wiring harness length provides flexibility during installation, but verify connector compatibility with your vehicle’s harness. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications.

Quality Assurance and Warranty

NTK’s Direct Fit Oxygen Sensor line is manufactured to meet OEM standards for durability and performance. While specific warranty details are not provided here, NTK products typically undergo rigorous testing to ensure reliability and long service life in emission control applications.