NTK 23557 Oxygen Sensor - Upstream

Direct Fit Oxygen Sensor

NTK Oxygen Sensor 23557 is a specific-fit, threaded oxygen sensor built for direct replacement applications. It uses a non-heated design with a 25.5-inch wiring harness and an 18 mm thread diameter for a precise installation profile.

Compatible With 1989-1991 Dodge Colt, upstream; 1989-1991 Eagle Vista, upstream; and 1989-1991 Plymouth Colt, upstream. This NTK Direct Fit Oxygen Sensor line is built around OE-style fit, form, and function for import and domestic coverage.

Key Features

• Specific-fit oxygen sensor for direct replacement use
• Non-heated sensor design
• Threaded mounting type with 18 mm thread diameter
• 25.5-inch wiring harness length
• NTK 23557 part number for application matching

Detailed Description

NTK 23557 is an upstream oxygen sensor for 1989-1991 Dodge Colt, 1989-1991 Eagle Vista, and 1989-1991 Plymouth Colt applications. The threaded, non-heated construction supports a direct-fit installation profile, while the specific-fit design helps maintain the intended sensor location and signal function for federal emissions applications noted in the fitment data. NTK uses manufacturing controls and testing to meet OE-level expectations for fit and reliability, and the 23557 part number is useful when cross-checking replacement needs.

This part cross-references Bosch 12053 for the same application.

What It Is Used For

• Replacing a worn or slow-responding oxygen sensor
• Restoring proper exhaust oxygen feedback to the engine control system
• Addressing emissions-related fault codes tied to sensor performance
• Correcting drivability issues caused by inaccurate air-fuel feedback

Installation Notes and Tips

Verify the upstream location and federal emissions application before ordering. Match the threaded mounting style, harness length, and connector layout to the original sensor, and confirm the 23557 part number against the existing unit or service information.

Quality Assurance

NTK states that these oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. As part of the NGK family of products, NTK focuses on OE application coverage and sensor technology for import and domestic vehicles.