HomeEmission Control > SensorsNTK 25733 Oxygen Sensor - Downstream
Part #: 25733

NTK 25733 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor, Downstream
29 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Direct Fit Oxygen Sensor, Downstream
Fitment: Hyundai and Kia, Tucson, Forte, Forte5, Elantra GT, Forte Koup, Rondo, Elantra, and Elantra Coupe
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of NTK Direct Fit Oxygen Sensor 25733

The NTK Direct Fit Oxygen Sensor 25733 is designed specifically for select Hyundai and Kia models, including the Elantra, Forte, and Tucson. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.

  • Heated sensor type for faster response times
  • Specific fit for Hyundai Elantra, Elantra Coupe, Elantra GT, Kia Forte, Forte5, Forte Koup, Rondo, and Tucson
  • 29.5-inch wiring harness length for convenient installation
  • Threaded mounting type with 18mm thread diameter
  • Four-wire configuration for reliable electrical connection

Detailed Product Features and Specifications

This NTK oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving sensor response and reducing emissions during cold starts. The 29.5-inch wiring harness length provides ample reach for direct replacement without modification. Its 18mm threaded mounting type ensures a secure and proper fit in the exhaust system. The four-wire design supports both the sensor signal and heater circuit, maintaining consistent performance. This sensor is a specific fit part, engineered to match the original equipment specifications for Hyundai and Kia vehicles listed, ensuring compatibility and reliable operation.

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is developed to provide exact replacement sensors that meet or exceed OEM standards. These sensors are designed for direct installation without the need for splicing or additional adapters, simplifying the replacement process. The line focuses on delivering precise emissions control components tailored to specific vehicle applications, such as the NTK 25733 sensor for Hyundai and Kia models.

Common Applications and Issues Addressed

  • Restores accurate air-fuel ratio readings for engine control
  • Helps resolve check engine light codes related to oxygen sensor failure
  • Improves fuel efficiency by ensuring proper combustion
  • Reduces harmful emissions by maintaining optimal sensor function
  • Prevents rough idling and engine performance issues caused by faulty sensors

Installation Notes and Tips

When installing the NTK 25733 oxygen sensor, ensure the vehicle is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector match the vehicle’s original sensor to avoid electrical issues. Apply anti-seize compound to the threads if recommended by the vehicle manufacturer, but avoid contaminating the sensor tip. Tighten the sensor to the specified torque to prevent exhaust leaks.

Quality Assurance and Warranty

NTK oxygen sensors undergo rigorous testing to meet OEM quality standards for durability and performance. The Direct Fit Oxygen Sensor 25733 is manufactured to provide consistent operation under demanding conditions. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship to ensure customer confidence in the product.

BrandNTK
Part Number25733
PositionDirect Fit Oxygen Sensor, Downstream
Mounting TypeThreaded
Sensor TypeHeated
Thread Diameter18.000
Universal Or Specific FitSpecific
Wire Quantity4
Wiring Harness Length29.5000

This part fits 29 vehicles. Search below:

YearMakeModelBody TypeDrive TypeLitersCylindersPositionNotes
2018HyundaiTucsonAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2018KiaForte2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2018KiaForte52.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2017HyundaiElantra GTHatchback2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2017HyundaiTucsonAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2017KiaForte2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2017KiaForte Koup2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2017KiaForte52.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2016HyundaiElantra GTHatchback2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2016HyundaiTucsonAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2016KiaForte2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2016KiaForte Koup2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2016KiaForte52.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2016KiaRondo2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2015HyundaiElantra GTHatchback2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2015KiaForte2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2015KiaForte Koup2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2015KiaForte52.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2015KiaRondo2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2014HyundaiElantra GTHatchback2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2014KiaForte2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2014KiaForte Koup2.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2014KiaForte52.0LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2014KiaRondo2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
2013HyundaiElantra1.8LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2013HyundaiElantra Coupe1.8LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2013HyundaiElantra GT1.8LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2012HyundaiElantra1.8LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor
2011HyundaiElantra1.8LL4DownstreamB1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1810318143234-4550234-4569234-4958392102E500392102E502392102E510392102E511392102E550392102ETL4

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.