NTK 23195 Oxygen Sensor

Direct Fit Oxygen Sensor for OE Replacement

The NTK 23195 direct fit oxygen sensor is a standard replacement part built for precise air-fuel monitoring and emissions control. It uses a heated, narrow-band switching zirconia design with a 4-wire layout and a specific-fit connector for straightforward replacement on listed Ram, Dodge, Jeep, Mercedes-Benz, and Mitsubishi applications.

As part of NTK’s Direct Fit Oxygen Sensor line, this sensor is engineered to match OE-style fitment and electrical connection requirements. NTK is a major OEM oxygen sensor supplier, and the 23195 reflects that focus with application-specific construction for vehicles that rely on accurate closed-loop feedback to the ECU.

Key Features

• NTK part number 23195
• Heated narrow-band oxygen sensor
• Switching zirconia sensing technology
• Specific fit with rectangular female connector
• 4-wire, 4-terminal design
• Threaded screw-in mounting with M18 x 1.5 thread size
• 7/8 in. hex / wrench size
• Wiring harness length: 13.98 in. (355 mm)
• Overall length: 18.15 in. (461 mm)

Detailed Description

The NTK 23195 oxygen sensor is built for vehicles that need accurate exhaust oxygen feedback to help maintain proper fuel delivery and catalytic converter monitoring. It is a direct fit replacement for select Ram 1500, Ram 2500, Ram 3500, Dodge Viper, Dodge Dart, Jeep Wrangler, Jeep TJ, and other listed applications, including upstream and downstream positions. If you are replacing a worn sensor on a 2013-2018 Ram 1500 upstream left or a 2004-2006 Jeep Wrangler upstream application, this NTK sensor is matched to the original style connection and mounting format.

This part cross-references Bosch 15123 and DENSO Auto Parts 234-4579 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle or inconsistent air-fuel control
• Reduced fuel economy from inaccurate exhaust feedback
• Emissions faults tied to sensor response or heater circuit issues
• Catalytic converter efficiency monitoring concerns

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is listed for upstream left, upstream right, upstream, downstream left, and downstream right locations depending on the vehicle. Verify the thread size, connector shape, wire count, and harness length against the original sensor before installation. For best results, inspect the exhaust bung threads and wiring routing during replacement, especially on Ram, Dodge Viper, and Mercedes-Benz applications where heat exposure can affect sensor wiring.

Quality Assurance

NTK is a long-standing OEM oxygen sensor manufacturer with in-house control of ceramic element production from raw material through finished sensor. That manufacturing approach supports consistent sensor construction and OE application coverage for the NTK 23195.