NTK 25270 Oxygen Sensor

Direct Fit Oxygen Sensor for Mercedes-Benz and Jeep

NTK 25270 is a direct fit oxygen sensor built for specific downstream and upstream applications across Mercedes-Benz, Smart, Jeep, Dodge, and Chrysler vehicles. As a heated narrow-band sensor with a 4-wire, threaded screw-in design, it provides the closed-loop feedback the engine control unit uses to manage air-fuel ratio and monitor emissions system performance.

Key Features

• Direct fit oxygen sensor for specific OE applications
• Heated narrow-band switching zirconia design
• 4-wire configuration with rectangular female connector
• Threaded M18 x 1.5 mounting with 7/8 in. hex size
• Wiring harness length: 10.83 in. / 275 mm
• Overall length: 15.00 in. / 381 mm
• Standard replacement grade for emission control service
• NTK direct fit oxygen sensor line supports OE application coverage

Product Details

NTK 25270 is engineered as a specific-fit oxygen sensor for vehicles that rely on precise exhaust feedback to maintain fuel control and emissions monitoring. NTK is a major OEM oxygen sensor supplier, and this sensor reflects that OE-focused approach with a heated narrow-band switching zirconia element, pin terminals, and a rectangular female connector for direct replacement service. This part cross-references Bosch 13672 for the same application.

Compatible applications include 2017-2021 Mercedes-Benz AMG GT, 2016-2019 Mercedes-Benz GLE400, 2015-2018 Mercedes-Benz CLS550, 2010-2011 Jeep Wrangler, 2003-2004 Dodge Neon, and 2003 Chrysler PT Cruiser. The NTK 25270 also covers additional Mercedes-Benz, Smart, and AMG variants listed in the fitment data, including downstream right and upstream positions where specified.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Reduced fuel economy caused by inaccurate exhaust readings
• Emissions monitor faults tied to sensor response issues
• Catalytic converter efficiency codes triggered by sensor data errors

Installation Notes and Tips

Verify the exact position before ordering, since this part is listed for downstream right, downstream left, downstream, upstream left, and upstream applications depending on vehicle. Confirm the M18 x 1.5 thread size, 7/8 in. wrench size, 4-wire connector layout, and harness length against the original sensor before installation. For best results, compare the OE connector shape and terminal count to the removed part, especially on Mercedes-Benz AMG GT, GLE, and ML applications.

Quality Assurance

NTK manufactures oxygen sensors with in-house ceramic technology and OE application focus, supporting consistent sensor construction from raw material through finished component. Part number 25270 is built as a standard replacement oxygen sensor for direct-fit service on the listed vehicles.