NTK 23556 Oxygen Sensor

NTK Direct Fit Oxygen Sensor for OE Replacement

The NTK Direct Fit Oxygen Sensor, part number 23556, is a heated, threaded, specific-fit sensor built for direct replacement in select Chrysler, Dodge, Jeep, and Mitsubishi applications. It is engineered for accurate exhaust monitoring and OE-style fitment on vehicles such as the Dodge Ram 1500, Jeep Grand Cherokee, and Chrysler Aspen.

Key Features

• Heated oxygen sensor with 4-wire design for faster operating temperature
• Specific-fit construction for direct replacement on listed applications
• Threaded mounting type with 18 mm thread diameter
• Wiring harness length: 17.75 in.
• OE-style fit, form, and function for emission control service
• NTK part number 23556 for easy identification

Product Details

NTK is known for oxygen sensor manufacturing and OE application coverage, and the Direct Fit Oxygen Sensor line is built to streamline replacement selection while maintaining original-equipment style performance. This sensor uses ceramic-based sensing technology developed under NTK’s manufacturing expertise and is tested during production to meet or exceed OE specifications. For drivers searching for a direct-fit oxygen sensor for 2005-2007 Dodge Ram 1500, 2005-2007 Jeep Grand Cherokee, or 2007 Chrysler Aspen applications, NTK 23556 provides a service-ready replacement option.

This part cross-references DENSO Auto Parts (e.g., 234-4719, 234-4744) for the same application.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn upstream sensor
• Slow sensor response caused by age or contamination
• Downstream monitoring faults affecting emissions diagnostics
• OE replacement needs for service on Chrysler, Dodge, Jeep, and Mitsubishi vehicles

Installation Notes and Fitment

Fits 2007 Chrysler Aspen, upstream right and upstream left. Fits 2005-2007 Dodge Dakota, upstream right, upstream left, and downstream right. Fits 2005-2007 Dodge Durango, upstream right, upstream left, and downstream right. Fits 2005-2007 Dodge Ram 1500, upstream right, upstream left, downstream right, and downstream left. Fits 2006-2007 Jeep Commander, upstream right, upstream left, downstream right, and downstream left. Fits 2005-2007 Jeep Grand Cherokee, upstream right, upstream left, downstream right, and downstream left. Fits 2006-2007 Mitsubishi Raider, upstream right and upstream left. Additional listed applications include 2006 Chrysler Pacifica, 2005-2006 Dodge Durango, 2005 Chrysler Pacifica, 2005 Dodge Dakota, 2004 Dodge Dakota, 2004 Dodge Durango, 2003 Dodge Dakota, 2003 Dodge Durango, and 2003 Dodge Ram 1500 in the positions shown in the fitment data.

Confirm the sensor position before installation, since upstream and downstream locations use different monitoring functions. The threaded design and specific-fit harness help support direct replacement without modification on the listed vehicles. Verify connector routing and exhaust thread condition before final installation.

Quality Assurance

NTK manufactures oxygen sensors with OE-focused engineering and extensive production testing to support reliability and specification accuracy. As part of the NGK family of products, NTK backs this sensor line with application coverage for import and domestic vehicles and OE-style performance expectations.