NTK 24039 Oxygen Sensor - Upstream Left or Upstream Right

Direct Fit Oxygen Sensor for Infiniti and Nissan

NTK Oxygen Sensor 24039 is a direct fit, heated oxygen sensor built for specific applications that require OE-style fit, form, and function. It is engineered for upstream right and upstream left positions on select Infiniti Q45, Infiniti J30, and Nissan 300ZX models, with application coverage spanning 1990-2001.

Key Features

• Heated oxygen sensor with specific fitment for direct replacement
• Threaded mounting type with 18.000 mm thread diameter
• 3-wire design with 22.7500 wiring harness length
• Built to meet or exceed OE specifications through manufacturing testing
• Direct fit oxygen sensor for select Infiniti Q45, Infiniti J30, and Nissan 300ZX applications

Product Details

NTK 24039 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific replacement parts for import and domestic vehicles. NTK uses ceramic-based sensor technology and OE application coverage to deliver a sensor that matches the original mounting and electrical requirements of the vehicle. For drivers searching for an oxygen sensor for 1990-1996 Nissan 300ZX upstream left, or an oxygen sensor for 1994-1996 Nissan 300ZX upstream right, this part provides a direct replacement path without universal-fit compromises. It also covers select Infiniti Q45 and Infiniti J30 positions, including upstream left and upstream right locations.

This part cross-references Bosch 13091 and DENSO Auto Parts 234-3087 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings at the upstream sensor location
• Slow or inaccurate sensor response during closed-loop operation
• Replacement needs for aging OE oxygen sensors on Infiniti Q45, Infiniti J30, and Nissan 300ZX
• Fitment issues caused by using a universal sensor instead of a direct-fit design

Installation Notes and Tips

Confirm the vehicle year, engine configuration, and sensor position before ordering. This NTK 24039 oxygen sensor uses a threaded mounting style and a 3-wire heated design, so the connector and harness routing should match the original application. For best results, compare the existing sensor location to the listed fitment: Fits 1990-1996 Nissan 300ZX, upstream left; Fits 1994-1996 Nissan 300ZX, upstream right; Fits 1993-1997 Infiniti J30, upstream left; Fits 1991-1992 Infiniti Q45, upstream right; Fits 1993 Infiniti Q45, upstream right; Fits 1998 Infiniti Q45, upstream left; Fits 1998 Infiniti Q45, upstream right; Fits 1999-2001 Infiniti Q45, upstream left; Fits 1999-2001 Infiniti Q45, upstream right.

Quality Assurance

NTK is a major original equipment oxygen sensor manufacturer, and this Direct Fit Oxygen Sensor is extensively tested during production to help ensure quality and reliability that meet or exceed OE specifications. The NTK 24039 is built for consistent sensor performance in import applications where accurate exhaust feedback is required.