NTK 25212 Oxygen Sensor - Downstream Left or Downstream Right

Direct Fit Oxygen Sensor for Hyundai and Kia

The NTK 25212 is a direct fit heated oxygen sensor built for specific downstream applications on select Hyundai and Kia vehicles. It is engineered for threaded mounting, 4-wire operation, and OE-style fit, form, and function.

Key Features

• Direct Fit Oxygen Sensor from NTK
• Heated sensor design for downstream exhaust monitoring
• Specific fit for select Hyundai Genesis, Genesis Coupe, Santa Fe, Kia K900, and Sorento applications
• 4-wire configuration with 11.0000 wiring harness length
• 18.000 thread diameter and threaded mounting type
• OE application coverage backed by extensive manufacturing testing

Product Details

NTK is part of the NGK family of products and focuses on oxygen sensor coverage for import and domestic vehicles. The 25212 uses ceramic technology developed in-house from raw material through finished sensor production, supporting consistent signal performance and OE-level application matching. This part cross-references Bosch 18045 and DENSO Auto Parts 234-4456 for the same application. It is a direct replacement oxygen sensor for downstream right and downstream left positions on select Hyundai Genesis, Hyundai Genesis Coupe, Kia K900, Kia Sorento, and Hyundai Santa Fe models.

What This Oxygen Sensor Helps Address

• Check engine light related to downstream oxygen sensor performance
• Fault codes tied to air-fuel ratio monitoring or catalyst efficiency
• Rough emissions test results caused by a failing heated O2 sensor
• Signal issues from worn wiring, contamination, or sensor aging
• OE replacement needs for specific Hyundai and Kia exhaust locations

Installation Notes and Fitment

• Fits 2015-2017 Kia K900, downstream right.
• Fits 2015-2017 Kia K900, downstream left.
• Fits 2012-2016 Hyundai Genesis, downstream right.
• Fits 2012-2014 Hyundai Genesis, downstream left.
• Fits 2013-2016 Hyundai Genesis Coupe, downstream right.
• Fits 2013-2016 Hyundai Genesis Coupe, downstream left.
• Fits 2011-2013 Kia Sorento, downstream left.
• Fits 2010-2012 Hyundai Santa Fe, downstream left.

Confirm the sensor position before installation, since this part is listed for downstream right and downstream left locations depending on the vehicle. Match the connector, thread size, and harness routing to the original sensor for proper installation.

Quality Assurance

NTK is a major original equipment oxygen sensor supplier and manufacturer, and this part is manufactured and tested to meet or exceed OE specifications for fit and reliability. The brand’s focus on sensor technology and application coverage supports accurate replacement selection for Hyundai and Kia emissions systems.