NTK 21575 Oxygen Sensor - Upstream Left or Upstream Right

Overview of NTK Direct Fit Oxygen Sensor 21575

The NTK Direct Fit Oxygen Sensor 21575 is engineered for precise emission control in select Cadillac, Chevrolet, Pontiac, and Suzuki vehicles. Designed as a heated oxygen sensor with a specific fit, it ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor type for faster response times
• Specific fit for Cadillac CTS, SRX, STS; Chevrolet Equinox; Pontiac Torrent; Suzuki XL-7
• Threaded mounting type with 18mm thread diameter
• Four-wire configuration for reliable signal transmission
• Wiring harness length of 14.75 inches for proper installation

Detailed Product Description

This NTK oxygen sensor, part number 21575, belongs to the Direct Fit Oxygen Sensor line, which focuses on providing exact replacement sensors tailored to specific vehicle applications. The heated sensor design allows quicker activation, improving emission control system efficiency shortly after engine start. With a threaded mounting type and an 18mm thread diameter, this sensor installs securely in the exhaust system. The four-wire setup supports both the sensor signal and heater circuit, while the 14.75-inch wiring harness length accommodates factory routing without modification.

Compatible Vehicles and Applications

This oxygen sensor is compatible with the following makes and models:

• Cadillac CTS, SRX, STS
• Chevrolet Equinox
• Pontiac Torrent
• Suzuki XL-7

It is designed to replace the original sensor directly, ensuring proper fit and function in these vehicles.

Common Issues Addressed by This Oxygen Sensor

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor malfunction
• Engine performance problems such as rough idling or hesitation
• Failed emissions tests related to sensor failure

Installation Notes and Tips

When installing the NTK 21575 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the wiring harness length of 14.75 inches is sufficient for your vehicle’s routing. Confirm the four-wire connector matches the factory harness to ensure proper electrical connections. Follow vehicle-specific service manual instructions for torque specifications and sensor location.

Quality Assurance and Warranty

NTK’s Direct Fit Oxygen Sensor line is manufactured to meet OEM specifications for fit, form, and function. Each sensor undergoes rigorous testing to ensure durability and accurate performance. While specific warranty details for part number 21575 are not provided here, NTK typically offers limited warranties covering defects in materials and workmanship. Consult the product packaging or NTK’s official resources for exact warranty terms.