NTK 25150 Oxygen Sensor - Downstream

Overview of NTK Direct Fit Oxygen Sensor 25150

The NTK Direct Fit Oxygen Sensor 25150 is engineered for precise emission control in select Hyundai and Kia 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 for faster response times
• Specific fit for Hyundai Magentis, Sonata, Santa Fe and Kia Optima models
• 22.25-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 25150, belongs to the Direct Fit Oxygen Sensor line, which focuses on providing exact replacement sensors tailored to specific vehicle applications. The heated sensor element allows quicker activation, improving fuel efficiency and emissions control shortly after engine start. With a 22.25-inch wiring harness, it offers sufficient length for straightforward connection without excess slack. The threaded mounting type with an 18mm diameter ensures secure and proper installation in the exhaust system. The four-wire design supports both the sensor signal and heater circuit, maintaining consistent sensor operation under various conditions.

Compatible Vehicles and Applications

• Hyundai Magentis
• Hyundai Sonata
• Hyundai Santa Fe
• Kia Optima

This oxygen sensor is specifically designed to replace the factory sensor in these models, ensuring compatibility and maintaining emission standards.

Common Issues Addressed by NTK Oxygen Sensor 25150

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased exhaust emissions and failed emissions tests
• Engine performance problems such as rough idling or hesitation
• Heater circuit failure causing delayed sensor response

Installation Notes and Tips

When installing the NTK 25150 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector match the vehicle’s factory sensor to prevent electrical issues. Apply anti-seize compound on the sensor threads if not pre-coated, but avoid contaminating the sensor tip. Tighten the sensor to the manufacturer’s torque specifications to ensure a proper seal.

Quality Assurance and Warranty

NTK oxygen sensors undergo rigorous testing to meet OEM standards for durability and performance. The Direct Fit Oxygen Sensor line is designed to provide reliable operation and maintain emission compliance. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship to support long-term use.