NTK 22138 Oxygen Sensor - Downstream or Upstream

Direct Fit Oxygen Sensor for Ford Fiesta

NTK Direct Fit Oxygen Sensor 22138 is a specific-fit heated oxygen sensor built for select Ford Fiesta applications. It is engineered with a 4-wire configuration, 18 mm thread diameter, threaded mounting, and a 15.25 in. wiring harness length for OE-style replacement on upstream and downstream positions.

Key Features

• Specific-fit oxygen sensor for select Ford Fiesta models
• Heated sensor design for faster operating readiness
• 4-wire configuration with 15.2500 wiring harness length
• 18.000 thread diameter and threaded mounting type
• Direct Fit Oxygen Sensor line for OE-style application coverage
• Part number 22138 for accurate catalog matching

Product Details

NTK is a sensor-focused brand within the NGK family, and the Direct Fit Oxygen Sensor line is built to streamline replacement selection while maintaining OE application coverage. Part number 22138 is manufactured for specific-fit use on Ford Fiesta oxygen sensor locations, including upstream and downstream positions listed in the fitment data. This sensor is a practical choice for Ford Fiesta oxygen sensor replacement when the original unit needs to be restored to proper signal output and emissions-system operation.

This part cross-references Bosch 18124 for the same application.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the engine control system
• Slow sensor response from a worn heated oxygen sensor
• Emissions test failures tied to faulty upstream or downstream sensing
• Driveability issues caused by inaccurate exhaust oxygen readings

Installation Notes

Verify the connector style, sensor position, and thread size before installation. This NTK 22138 oxygen sensor uses a threaded mounting design and a 4-pin connector application on listed Ford Fiesta fitments. Confirm whether your vehicle requires an upstream or downstream sensor before ordering, and compare the original harness length to the replacement part.

• Fits 2014-2019 Ford Fiesta, Upstream; B1S1; 4 Pin Connector; OE MFR: NTK; Direct Fit Oxygen Sensor
• Fits 2011-2019 Ford Fiesta, Downstream; B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
• Fits 2011-2013 Ford Fiesta, Upstream; Bank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor

Quality Assurance

NTK manufactures oxygen sensors with ceramic technology control from raw material through finished product and tests sensors during production to support quality and reliability that meet or exceed OE specifications. The Direct Fit Oxygen Sensor line is backed by NTK’s OE application focus and full-line market support for import and domestic vehicles.