NTK 25745 Oxygen Sensor - Downstream

Direct Fit Downstream Oxygen Sensor

NTK Direct Fit Oxygen Sensor 25745 is a heated, specific-fit downstream oxygen sensor for select Hyundai and Kia applications. It is built with an original-equipment equivalent design to support accurate exhaust monitoring and straightforward replacement on the listed vehicles.

Key Features

• Heated oxygen sensor for faster operating readiness
• Specific-fit design for direct replacement on the listed applications
• 18 mm threaded mounting type
• 4-wire configuration with 18.7500 wiring harness length
• OE-style fit, form, and function for downstream use
• Part number 25745 for easy identification

Product Details

NTK is the Sensor Specialist for import and domestic applications, and the Direct Fit Oxygen Sensor line is focused on OE application coverage and streamlined replacement selection. Part number 25745 uses NTK’s ceramic sensor expertise and manufacturing controls to deliver a sensor built to match original equipment requirements for the downstream position. This sensor is listed for 2014-2015 Hyundai Tucson, downstream, and 2012-2013 Kia Soul, downstream. This part cross-references Hyundai/Kia OE number 392102E700 for the same application.

For buyers searching for a 2014 Hyundai Tucson downstream oxygen sensor, a 2015 Hyundai Tucson downstream O2 sensor, or a 2012-2013 Kia Soul downstream oxygen sensor, NTK 25745 provides a direct-fit replacement option with the correct threaded mount and heated 4-wire design.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Incorrect exhaust oxygen readings after sensor aging or contamination
• Slow sensor response that can affect emissions monitoring
• Fault codes tied to heater circuit or sensor signal issues
• Replacement needs after original sensor wear on Hyundai Tucson or Kia Soul applications

Installation Notes

Verify the downstream sensor location before installation and confirm connector and thread match to the original unit. Use the vehicle’s service information for torque and routing guidance, and inspect the harness path to avoid heat damage or strain. Confirm fitment by year, make, model, and position before ordering.

Quality Assurance

NTK manufactures oxygen sensors with extensive testing during production to support quality and reliability that meet or exceed OE specifications. As part of the NGK family of products, NTK focuses on original-equipment-level application coverage and sensor technology for import and domestic vehicles.