NTK 25166 Oxygen Sensor - Downstream Right

Overview of NTK Direct Fit Oxygen Sensor 25166

The NTK Direct Fit Oxygen Sensor 25166 is designed specifically for select Hyundai and Kia models, including the Magentis, Optima, Santa Fe, and Sonata. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.

• Heated sensor type for faster response times
• Specific fit for Hyundai and Kia vehicles
• 24.75-inch wiring harness length for easy installation
• Threaded mounting type with 18mm thread diameter
• Four-wire configuration for reliable signal transmission

Detailed Product Features and Specifications

The NTK Direct Fit Oxygen Sensor 25166 features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its specific fitment ensures compatibility with Hyundai Magentis, Kia Optima, Santa Fe, and Hyundai Sonata models, eliminating the need for modifications. The sensor includes a 24.75-inch wiring harness, providing sufficient length for straightforward installation without stretching or splicing wires. The threaded mounting type with an 18mm diameter allows secure attachment to the exhaust system, while the four-wire design supports both the sensor signal and heater circuit for consistent performance.

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is engineered to provide precise replacement parts that match original equipment specifications. This product line focuses on delivering sensors that fit specific vehicle makes and models, ensuring proper function and ease of installation. The 25166 part number is part of this line, offering a direct replacement solution for emission control systems in Hyundai and Kia vehicles.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for engine control units
• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel economy by providing correct sensor data
• Reduces harmful emissions by maintaining proper combustion
• Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

When installing the NTK 25166 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 24.75-inch harness length allows for flexible routing, but avoid sharp bends or contact with hot exhaust components. Thread the sensor carefully into the exhaust port with the 18mm diameter fitting, tightening to manufacturer torque specifications. Verify electrical connections are secure before completing installation.

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. The Direct Fit Oxygen Sensor 25166 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 provide confidence in product quality.