NTK 23501 Oxygen Sensor - Upstream

Direct-Fit Oxygen Sensor

NTK oxygen sensor 23501 is a specific-fit, threaded sensor built for upstream air/fuel ratio control. It uses a non-heated, 2-wire design with a 17.75-inch harness and an 18 mm thread diameter for applications that call for a direct-fit replacement.

Key Features

• Specific-fit oxygen sensor for targeted applications
• Non-heated, 2-wire construction
• Threaded mounting with 18 mm thread diameter
• 17.75-inch wiring harness length
• Direct-fit design for streamlined replacement

Application Details

This NTK oxygen sensor 23501 is engineered for upstream use on select Mitsubishi Mighty Max and Dodge Ram 50 applications. Fitment includes 1990-1995 Mitsubishi Mighty Max, upstream, and 1990-1993 Dodge Ram 50, upstream, with notes covering Federal and California emissions configurations where listed. This part cross-references Delphi ES10678 and DENSO Auto Parts 234-2067 for the same application.

What It Helps Resolve

• Faulty oxygen sensor readings
• Air-fuel mixture control issues
• Check engine light concerns related to sensor performance
• Emissions-related drivability problems

Installation Notes and Tips

Confirm the upstream location, emissions configuration, and connector/wire layout before installation. Match the threaded mounting style and harness length to the original sensor on the vehicle. Use the fitment notes for Bank 1 Sensor 1 and emissions-specific coverage on Mitsubishi Mighty Max and Dodge Ram 50 applications.

Quality Assurance

NTK is part of the NGK family and is a major original equipment oxygen sensor supplier. NTK oxygen sensors are manufactured and tested to meet or exceed OE specifications for fit, form, and function.