NTK 24390 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
NTK
 Direct Fit 5-Wire A/F Sensor

NTK 24390 Air / Fuel Ratio Sensor - Upstream

Brand NTK 24390
Position Upstream
Mounting Bracket Included No
Sensor Type Heated
Thread Diameter 18.000
Thread Length 0.38
Universal Or Specific Fit Specific
Wire Quantity 5
Wiring Harness Length 26.0
Product line Direct Fit 5-Wire A/F Sensor
Fits Hyundai and Kia · 67 vehicles

Direct fit. Specific-fit sensor for straightforward replacement.

Heated sensor. Helps the sensor reach operating temperature quickly.

5-wire design. Supports precise air-fuel ratio monitoring.

Cross-references Baldwin 18055, Bosch 18089 and DENSO Auto Parts 234-5030 for the same application. See all 6.

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Not what you need? See all Air / Fuel Ratio Sensor options

NTK Direct Fit Air/Fuel Ratio Sensor 24390

NTK 24390 is a direct fit heated air/fuel ratio sensor built for specific upstream applications on select Hyundai and Kia vehicles. It uses a 5-wire design with OE-style fit, form, and function to support accurate exhaust feedback in the engine management system.

Built for import and domestic coverage, this NTK Direct Fit 5-Wire A/F Sensor is engineered for the upstream position on vehicles such as the Hyundai Sonata, Hyundai Tucson, Kia Forte, Kia Forte Koup, Kia Forte5, Kia Optima, and Kia Sportage.

Key Features

  • Direct fit air/fuel ratio sensor for specific applications
  • Heated sensor design for faster operating temperature
  • 5-wire configuration
  • 26.0 in. wiring harness length
  • 18.000 mm thread diameter
  • 0.38 in. thread length
  • Specific fit for easier OE-style replacement
  • Upstream position coverage

Product Details

NTK is a long-standing OE sensor manufacturer with deep ceramics and oxygen-sensor expertise. Part number 24390 is manufactured to meet or exceed OE specifications and is extensively tested during production for quality and reliability. The sensor line is built around controlled ceramic technology and application-specific coverage, helping maintain the correct signal response for engine control on the listed Hyundai and Kia platforms. This part cross-references DENSO Auto Parts (e.g., 234-5030, 234-5044) for the same application.

What This Sensor Helps Address

  • Check engine light related to upstream air/fuel ratio sensor faults
  • Incorrect exhaust feedback to the engine control module
  • Rough idle or drivability issues tied to sensor signal degradation
  • Fuel trim concerns caused by a worn or slow-responding sensor
  • Emission control faults on Federal Emissions applications

Installation Notes

  • Verify the connector, thread size, and harness length before installation.
  • Install in the upstream location specified for the vehicle and engine configuration.
  • Inspect the exhaust bung and wiring routing before fitting the sensor.
  • Confirm the application against the vehicle’s year, make, model, and emissions setup.

Quality Assurance

NTK manufactures oxygen and air/fuel ratio sensors with OE-level application coverage and production testing for consistency. Part number 24390 is built for specific fitment on select Hyundai Sonata and Hyundai Tucson applications, as well as Kia Forte, Forte Koup, Forte5, Optima, and Sportage models listed above.

Related reading

This part fits 67 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
2014HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013HyundaiTucson—2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013HyundaiTucsonManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013HyundaiTucsonAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForteAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForteManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaForteAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte KoupManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaForte KoupAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte KoupManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaForte KoupAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte5Manual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaForte5Automatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte5Manual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaForte5Automatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaOptimaManual2.4LL4GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaOptimaAutomatic2.4LL4GASUpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaSportageManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaSportageAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012HyundaiSonataManual2.4LL4GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012HyundaiTucson—2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012HyundaiTucsonManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012HyundaiTucsonAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForteAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForteManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaForteAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte KoupManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaForte KoupAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte KoupManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaForte KoupAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte5Manual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaForte5Automatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte5Manual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaForte5Automatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaOptimaManual2.4LL4GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaOptimaAutomatic2.4LL4GASUpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaSportageManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaSportageAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011HyundaiSonataManual2.4LL4GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011HyundaiTucson—2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011HyundaiTucsonManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011HyundaiTucsonAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForteManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaForteAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForteManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaForteAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForte KoupManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaForte KoupAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForte KoupManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaForte KoupAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaOptimaManual2.4LL4GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaOptimaAutomatic2.4LL4GASUpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaSportageManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaSportageAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010HyundaiTucsonManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2010HyundaiTucsonAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForteManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2010KiaForteAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForteManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2010KiaForteAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForte KoupManual2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2010KiaForte KoupAutomatic2.4LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForte KoupManual2.0LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2010KiaForte KoupAutomatic2.0LL4—UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Baldwin — 18055Bosch — 18089DENSO Auto Parts — 234-5030DENSO Auto Parts — 234-5044392102G370392102G380