NTK 25679 Air / Fuel Ratio Sensor

NTK 25679 Direct Fit A/F Sensor

NTK 25679 is a direct fit, heated 4-wire air/fuel ratio sensor for select Nissan, INFINITI, and Suzuki applications. It is built for OE-style fit, form, and function, with application coverage for upstream positions on models such as the Nissan Altima, Frontier, Pathfinder, Sentra, Xterra, and INFINITI G35.

Key Features

• Direct Fit 4-Wire A/F Sensor for specific vehicle applications
• Heated sensor design for faster operating temperature
• 18.000 mm thread diameter with 0.38 thread length
• 15.8 wiring harness length for OE-style routing
• Specific fitment for upstream right, upstream left, upstream front, upstream rear, and upstream positions
• NTK part number 25679

Product Details

NTK Direct Fit 4-Wire A/F Sensor line is engineered for import and domestic coverage with OE application technology. As part of the NTK product line from the NGK family, this sensor reflects the brand’s focus on ceramic-based sensor manufacturing and controlled production from raw material through finished component. NTK 25679 is manufactured and tested to meet or exceed OE specifications for fit and reliability. This part cross-references Bosch 15380 and DENSO Auto Parts 234-9038 for the same application.

For fitment-focused searches, this sensor fits 2007-2012 Nissan Armada, upstream right and upstream left; fits 2008-2012 Nissan Pathfinder, upstream right and upstream left; and fits 2007-2010 INFINITI QX56, upstream right and upstream left. It also fits 2007-2011 Nissan Altima, 2007-2011 Nissan Versa, 2007-2010 Nissan Frontier, 2007-2010 Nissan Xterra, 2008-2010 Nissan Rogue, 2009-2010 Suzuki Equator, and 2007-2010 Nissan TITAN in the listed upstream positions.

What It Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Incorrect fuel trim readings from a worn upstream sensor
• Rough idle or drivability issues tied to sensor signal degradation
• Emissions test failures caused by a faulty A/F sensor
• Slow sensor response from aging heated oxygen sensor circuitry

Installation Notes and Tips

Verify the exact year, make, model, engine configuration, and sensor position before ordering. This is a specific-fit sensor, so match the upstream location and bank/sensor callout shown in the fitment data. Inspect the harness routing and connector condition before installation, and confirm the thread size and mounting depth match the original sensor.

Quality Assurance

NTK manufactures oxygen and air/fuel ratio sensors with OE-focused engineering and extensive production testing to support consistent performance. The brand’s sensor expertise and ceramic manufacturing background are used to maintain fit, form, and function across import and domestic applications.