NTK 23500 Oxygen Sensor - Upstream

Direct Fit Oxygen Sensor

NTK oxygen sensor 23500 is a specific-fit replacement for import applications that need accurate air/fuel ratio feedback. It is built with a flange mount, non-heated design, and a 19.75-inch wiring harness for direct-fit service.

Key Features

• Specific-fit oxygen sensor for direct replacement service
• Non-heated sensor design for the listed applications
• Flange mounting style for OE-style installation
• 19.75-inch wiring harness for proper reach
• 18 mm thread diameter

Detailed Description

NTK 23500 is a direct fit oxygen sensor engineered for upstream air/fuel ratio monitoring on select Chrysler, Dodge, Plymouth, and Mitsubishi models. Compatible With 1987-1989 Chrysler Conquest, upstream; 1986-1989 Mitsubishi Starion, upstream; 1986 Dodge Conquest, upstream; 1986 Plymouth Conquest, upstream; 1984-1985 Dodge Conquest, upstream; 1983-1985 Mitsubishi Starion, upstream; and 1984-1985 Plymouth Conquest, upstream. This part cross-references Bosch 12053 and Delphi ES10227 for the same application.

What It Is Used For

• Replacing a worn oxygen sensor that can affect fuel mixture control
• Restoring proper upstream exhaust feedback for engine management
• Addressing sensor-related drivability concerns tied to air/fuel ratio monitoring
• Correcting fitment issues caused by an incorrect sensor style or connector reach

Installation Notes and Tips

Verify the mounting style, thread diameter, and harness length before installation. This sensor uses a specific-fit design, so matching the listed application is important for proper installation on Chrysler Conquest, Mitsubishi Starion, and related models.

Quality Assurance

NTK is part of the NGK family of products and is a major original equipment oxygen sensor supplier. Each sensor is extensively tested during manufacturing to meet or exceed OE specifications for fit, form, and function.