NTK 25679 Air / Fuel Ratio Sensor

Overview of NTK Direct Fit 4-Wire A/F Sensor 25679

The NTK Direct Fit 4-Wire Air/Fuel Ratio Sensor 25679 is designed for precise emission control in select Nissan, Infiniti, and Suzuki vehicles. This heated sensor ensures accurate air/fuel mixture readings to support optimal engine performance and emissions compliance.

• Heated sensor type for faster warm-up and accurate readings
• Specific fit for Nissan, Infiniti, and Suzuki models including 350Z, Altima, Armada, and more
• 4-wire configuration for reliable electrical connection
• Thread diameter of 18.0 mm and thread length of 0.38 inches for proper installation
• Wiring harness length of 15.8 inches to accommodate factory routing
• Mounting bracket not included, designed for direct replacement

Details on the Direct Fit 4-Wire A/F Sensor Product Line

The NTK Direct Fit 4-Wire A/F Sensor product line focuses on providing exact replacement sensors engineered to match OEM specifications. This ensures compatibility and performance consistency for vehicles requiring a 4-wire heated air/fuel ratio sensor. The 25679 part number is part of this line, offering a direct fit solution that simplifies installation and maintains factory sensor functionality.

Product Description and Specifications

The NTK 25679 air/fuel ratio sensor is a heated sensor designed with a 4-wire configuration to provide accurate and timely feedback to the engine control unit (ECU). Its 15.8-inch wiring harness length allows for proper connection without modification, while the 18 mm thread diameter and 0.38-inch thread length ensure a secure fit in the exhaust system. This sensor is a specific fit for various Nissan, Infiniti, and Suzuki models such as the Nissan Altima, Pathfinder, and Frontier, as well as the Infiniti G35 and QX56, and Suzuki Equator and Xterra.

Common Applications and Issues Addressed

• Restores accurate air/fuel ratio readings for improved fuel efficiency
• Resolves check engine light triggers related to faulty A/F sensors
• Helps reduce emissions by providing precise sensor data to the ECU
• Corrects drivability issues caused by improper air/fuel mixture
• Replaces damaged or worn sensors in Nissan 350Z, Maxima, Rogue, and other compatible models

Installation Notes and Tips

Installation of the NTK 25679 sensor requires no modifications due to its direct fit design. Ensure the sensor threads and wiring harness connectors match the vehicle’s factory specifications. Use anti-seize compound on the threads to prevent seizing during future removal. Verify the sensor orientation and wiring connections before final tightening. This sensor does not include a mounting bracket, so use the existing bracket on the vehicle.

Quality Assurance and Warranty

NTK sensors are manufactured to meet strict OEM standards for durability and performance. The Direct Fit 4-Wire A/F Sensor 25679 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. Consult product documentation or the supplier for exact warranty terms.