NTK 25207 Oxygen Sensor - Upstream Right

Direct Fit Oxygen Sensor for Hyundai and Kia

NTK 25207 is a direct fit heated oxygen sensor built for specific upstream right applications. It is engineered for the Bank 1 Sensor 1 location on select Hyundai and Kia vehicles, including Hyundai Santa Fe XL, Hyundai Santa Fe, Kia Sedona, Kia Sorento, Hyundai Azera, and Kia Cadenza.

Key Features

• Direct fit, specific application oxygen sensor
• Heated sensor design for faster operating response
• 4-wire configuration with 18.75 in. wiring harness length
• Threaded mounting type with 18 mm thread diameter
• OE-style fit, form, and function for import and domestic coverage
• NTK part number 25207

Product Details

NTK 25207 is part of the Direct Fit Oxygen Sensor line, a product range focused on application-specific replacement sensors that match original equipment requirements. NTK develops its oxygen sensors with in-house ceramic technology and extensive manufacturing testing to help maintain consistent signal performance and reliable operation. This sensor is specified for upstream right, Bank 1 Sensor 1 use on vehicles such as the Hyundai Santa Fe XL and Kia Sorento, making it a direct replacement choice for emissions and fuel-control service.

This part cross-references DENSO Auto Parts 234-4571 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Slow sensor response during closed-loop operation
• Emissions test failures tied to upstream sensor faults
• Rough idle or drivability issues caused by inaccurate exhaust feedback

Installation Notes and Tips

Install NTK 25207 in the upstream right, Bank 1 Sensor 1 position only on the listed Hyundai and Kia applications. Verify connector routing, thread size, and harness length before installation, and confirm the vehicle’s engine layout matches the fitment listing. Use the vehicle year, make, model, and sensor position to confirm application accuracy before replacing the original sensor.

Quality Assurance

NTK is a major original equipment oxygen sensor manufacturer, and this sensor is manufactured and tested to meet or exceed OE specifications. The Direct Fit Oxygen Sensor line is built to support precise application matching and dependable performance on the listed Hyundai and Kia vehicles.