NTK 24525 Oxygen Sensor - Upstream Left or Upstream Right

Direct Fit Oxygen Sensor for Nissan and INFINITI

NTK 24525 is a direct fit heated oxygen sensor built for specific applications on select Nissan and INFINITI vehicles. It is engineered for OE-style fit, form, and function, with a threaded mounting design and a 3-wire configuration for straightforward replacement.

For drivers searching for a 1995-1999 Nissan Maxima upstream oxygen sensor or a 1996-1999 INFINITI I30 oxygen sensor replacement, this NTK sensor is built to match the original application requirements. The NTK Direct Fit Oxygen Sensor line focuses on application coverage and OE-level design for import and domestic vehicles.

Key Features

• Part number 24525 direct fit oxygen sensor
• Heated sensor design for faster operating response
• Specific fit for confirmed Nissan and INFINITI applications
• 3-wire configuration with 29.75 in. wiring harness length
• Threaded mounting type with 18 mm thread diameter
• OE-style replacement for upstream left and upstream right positions

Application Details

NTK 24525 is listed for 1995-1999 Nissan Maxima, upstream left and upstream right positions, as well as 1996-1999 INFINITI I30 and 1996-1997 INFINITI J30 applications. It also covers specific 1998 Nissan Maxima Federal Emissions configurations. If you need a direct fit oxygen sensor for Nissan Maxima or INFINITI I30 air/fuel ratio monitoring, this part number is built around those exact vehicle listings.

NTK is part of the NGK family of products and is known for oxygen sensor manufacturing with ceramic-based technology and extensive testing during production. The brand supplies original equipment oxygen sensors globally, and this product line is positioned around OE application coverage and consistent sensor performance.

What This Sensor Helps Address

• Check engine light related to oxygen sensor circuit faults
• Incorrect air/fuel ratio readings from a worn upstream sensor
• Slow sensor response affecting fuel control
• Emissions test failures tied to sensor performance
• Rough idle or drivability issues linked to aging O2 sensor data

Installation Notes

• Confirm the vehicle position before ordering: upstream left or upstream right.
• Match the connector and harness routing to the original sensor layout.
• Use the threaded mounting point and verify the 18 mm thread diameter before installation.
• Inspect the exhaust bung and surrounding components for damage or corrosion before replacement.
• Follow the vehicle service procedure for sensor removal and torque specifications.

Quality Assurance

NTK oxygen sensors are manufactured and tested to meet or exceed OE specifications. The 24525 part number is designed as a direct replacement for the listed Nissan Maxima, INFINITI I30, and INFINITI J30 applications, with OE-style fit and function supported by NTK’s original equipment manufacturing background.

This part cross-references Bosch (e.g., 13505, 13562) for the same application.