NTK 25224 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor for Hyundai and Kia

NTK Oxygen Sensor 25224 is a direct fit, heated downstream oxygen sensor built for specific applications in Hyundai and Kia vehicles. It is engineered for OE-style fit, form, and function, with a 4-wire design and threaded mounting for straightforward replacement.

Compatible with 2015-2022 Hyundai Sonata, Tucson, and Santa Fe applications, as well as 2016-2022 Kia Optima, Sorento, and Sportage downstream positions, this sensor supports accurate exhaust monitoring in the exact locations listed below.

Key Features

• Direct fit oxygen sensor for specific downstream applications
• Heated sensor design for faster operating response
• 4-wire configuration
• 17.0 in. wiring harness length
• 18.000 mm thread diameter
• Threaded mounting type
• OE-style replacement from NTK, the Sensor Specialist

Product Line Details

NTK Direct Fit Oxygen Sensors are part of NTK’s OE-focused sensor line, developed with ceramic manufacturing expertise and application coverage for import and domestic vehicles. NTK supplies original equipment oxygen sensors globally, and this product line is built to match the required fit and function for the listed Hyundai and Kia downstream applications.

Detailed Description

NTK 25224 is a downstream oxygen sensor for vehicles that require a specific-fit replacement in the exhaust stream. The heated design helps the sensor reach operating temperature efficiently, while the direct-fit configuration supports proper connector and harness routing for the listed applications. This part cross-references Hyundai/Kia OE application 392102G260 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Fault codes tied to air-fuel monitoring or catalyst efficiency
• Rough emissions inspection results caused by a failing sensor
• Slow or inaccurate exhaust oxygen readings
• Replacement needs after sensor aging, contamination, or electrical failure

Installation Notes and Tips

• Verify the vehicle’s year, make, model, and downstream position before ordering.
• Confirm the connector and harness routing match the original sensor.
• Inspect the exhaust bung threads before installation to ensure proper seating.
• Use the listed fitment only for the exact Hyundai and Kia applications shown.
• Clear diagnostic trouble codes after installation and confirm system operation.

Quality Assurance

NTK manufactures oxygen sensors to meet or exceed OE specifications and tests them during production for quality and reliability. As an OE supplier with extensive application coverage, NTK supports direct replacement needs for modern Hyundai and Kia emissions systems.