NTK 25211 Oxygen Sensor - Upstream Left

Overview of NTK Direct Fit Oxygen Sensor 25211

The NTK Direct Fit Oxygen Sensor 25211 is designed specifically for select Hyundai and Kia models, including the Azera, Cadenza, Santa Fe, Santa Fe XL, Sedona, and Sorento. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data.

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

Detailed Product Features and Specifications

The NTK 25211 oxygen sensor features a heated sensor type that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its specific fitment ensures compatibility with Hyundai Azera, Kia Cadenza, Santa Fe, Santa Fe XL, Sedona, and Sorento models, providing a direct replacement without modification. The sensor includes a 12.5-inch wiring harness, allowing for convenient routing and connection. The threaded mounting type with an 18mm diameter ensures secure installation in the exhaust system. The four-wire configuration supports both the sensor signal and heater circuit, maintaining consistent performance under various driving conditions.

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is engineered to provide precise fitment and reliable operation for specific vehicle applications. This product line focuses on delivering sensors that match OEM specifications, reducing installation time and ensuring proper emissions control. The 25211 sensor is part of this line, designed to meet the exact requirements of Hyundai and Kia models listed, supporting efficient engine management and compliance with emissions standards.

Common Applications and Issues Addressed

• Replacement for faulty or worn oxygen sensors in Hyundai and Kia vehicles
• Helps resolve engine performance issues related to incorrect air-fuel mixture
• Reduces emissions by providing accurate oxygen level readings
• Prevents check engine light triggers caused by sensor failure
• Improves fuel economy by enabling proper engine tuning

Installation Notes and Tips

When installing the NTK 25211 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the exhaust threads. The 12.5-inch wiring harness provides flexibility for routing, but verify connector compatibility before installation. Tighten the sensor to the manufacturer’s torque specifications to prevent leaks. It is recommended to clear any diagnostic trouble codes after installation to reset the engine control unit.

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. The Direct Fit Oxygen Sensor 25211 undergoes rigorous testing to comply with OEM specifications. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship, providing confidence in the sensor’s longevity and function.