NTK 22125 Oxygen Sensor - Upstream

NTK Direct Fit Oxygen Sensor for Ford Focus

NTK Part Number 22125 is a direct fit heated oxygen sensor for select Ford Focus applications. It is built as a specific-fit, threaded replacement with an 18 mm thread diameter and an 18-inch wiring harness length for the upstream manifold location.

Key Features

• Direct fit oxygen sensor for specific applications
• Heated sensor design for faster operating response
• 4-wire configuration
• 18 mm thread diameter with threaded mounting
• 18-inch wiring harness length
• Compatible with upstream manifold placement

Product Details

NTK 22125 is part of the Direct Fit Oxygen Sensor line, which focuses on OE-style replacement coverage and application-specific fitment. NTK uses ceramic sensor technology developed in-house and extensive manufacturing testing to support fit, form, and function that align with OE specifications. This oxygen sensor is listed for 2003-2006 Ford Focus upstream applications, including 2006 Ford Focus models with PZEV evaporative emissions and B1S1 manifold placement. If you are searching for a Ford Focus upstream oxygen sensor or an NTK 22125 replacement, this part matches the confirmed vehicle applications shown here.

This part cross-references Bosch 15804 for the same application.

Common Symptoms This Part May Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings
• Reduced fuel control accuracy
• Failed emissions inspection tied to sensor fault codes
• Slow or inconsistent upstream sensor response

Installation Notes and Tips

Install this sensor in the upstream manifold position only where listed in the fitment data. Confirm the connector routing, harness length, and threaded mounting location before installation. For best results, inspect the exhaust threads and wiring path for damage, corrosion, or heat-related wear before transferring the vehicle to service.

Quality Assurance

NTK is a major original equipment oxygen sensor manufacturer and tests these sensors during production to help ensure quality and reliability that meet or exceed OE specifications. The Direct Fit Oxygen Sensor line is built to support OE application coverage for import and domestic vehicles, including Ford Focus applications.