NTK 25690 Air / Fuel Ratio Sensor

NTK Direct Fit A/F Sensor for Nissan and INFINITI

NTK 25690 is a direct fit heated air/fuel ratio sensor built for specific upstream applications on select Nissan and INFINITI vehicles. It is engineered for OE-style fit, form, and function, with a 4-wire design and a 14.8-inch wiring harness for the listed applications.

Key Features

• Direct fit air/fuel ratio sensor for specific applications
• Heated sensor design for faster operating readiness
• 4-wire configuration
• 18.000 mm thread diameter with 0.38 thread length
• 14.8-inch wiring harness length
• Specific fit replacement for the listed upstream positions
• NTK part number 25690

Product Line Details

NTK Direct Fit 4-Wire A/F Sensor products are built around OE application coverage and sensor technology developed by NTK, a long-standing supplier of original equipment oxygen sensors. The line focuses on direct replacement fitment and manufacturing consistency for import and domestic vehicles, including applications such as the Nissan Murano and INFINITI G37.

Detailed Description

NTK 25690 is an OE-style air/fuel ratio sensor for select 2008 INFINITI G37 and 2009-2010 Nissan Murano applications. It is listed for upstream positions including Fits 2008 INFINITI G37, Upstream Right; Fits 2008 INFINITI G37, Upstream Left; Fits 2009-2010 Nissan Murano, Upstream Rear; and Fits 2009-2010 Nissan Murano, Upstream Front. This part cross-references Bosch 18063 for the same application. The sensor is designed as a heated, specific-fit replacement with the correct connector and harness length for the listed vehicles, helping maintain proper air/fuel ratio feedback to the engine control system.

What It Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Incorrect upstream oxygen sensor readings
• Rough idle or drivability issues tied to sensor feedback
• Fuel trim concerns caused by a failing sensor
• Emissions test failures linked to sensor response problems

Installation Notes and Tips

Verify the vehicle year, make, model, and sensor position before ordering. NTK 25690 is a specific-fit replacement, so connector style, thread size, and harness length should match the original sensor on the listed applications. Use proper exhaust sensor service practices during installation, and confirm the upstream location on the vehicle before removal.

Quality Assurance

NTK manufactures oxygen and air/fuel ratio sensors with OE-focused engineering and extensive production testing to support fitment and reliability for the listed applications. The brand’s sensor expertise and original equipment background are central to the design of NTK 25690.