NTK 25680 Air / Fuel Ratio Sensor - Upstream

Overview of NTK Direct Fit 4-Wire A/F Sensor 25680

The NTK Direct Fit 4-Wire A/F Sensor 25680 is designed for precise air/fuel ratio monitoring in select Acura and Honda vehicles. This heated sensor ensures accurate emissions control and optimal engine performance for models such as the Accord, Civic, and CR-V.

• Heated sensor type for faster response times
• Specific fit for Acura and Honda models including Accord, Civic, CR-V, and more
• 4-wire configuration with a 13.8-inch wiring harness length
• Thread diameter of 18.0 mm and thread length of 0.38 inches
• Direct Fit 4-Wire A/F Sensor brand line for reliable replacement
• No mounting bracket included

Detailed Product Description

This NTK air/fuel ratio sensor (part number 25680) is engineered to provide accurate feedback to the engine control unit by measuring the oxygen content in the exhaust gases. The heated sensor element allows for quicker activation and stable operation under various engine conditions. With a 4-wire design and a 13.8-inch wiring harness, this sensor is tailored for specific Acura and Honda vehicles, including the Civic, CR-Z, and TLX, ensuring a direct fit without modification. The sensor’s thread diameter of 18 mm and thread length of 0.38 inches match OEM specifications for proper installation and sealing.

The Direct Fit 4-Wire A/F Sensor product line focuses on delivering sensors that meet exact OEM fitment and performance standards. This line is designed to simplify replacement by providing a plug-and-play solution that maintains factory sensor functionality and durability.

Common Applications and Issues Addressed

• Restores accurate air/fuel ratio readings for improved fuel efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce emissions by ensuring proper combustion monitoring
• Prevents engine performance issues caused by faulty sensor signals
• Supports smooth engine operation and drivability in Acura and Honda models

Installation Notes and Tips

• Compatible with specific Acura and Honda models; verify vehicle fitment before installation
• Use proper tools to avoid damaging the sensor threads (18 mm diameter)
• Ensure wiring harness connections are secure and free of corrosion
• Do not reuse old mounting brackets as this sensor does not include one
• Follow vehicle manufacturer torque specifications when installing

Quality Assurance and Warranty

NTK sensors are manufactured to meet strict quality standards for durability and performance. The Direct Fit 4-Wire A/F Sensor 25680 undergoes rigorous testing to ensure reliable operation in emission control systems. Warranty coverage details should be confirmed with the original equipment manufacturer or authorized distributor.