NTK 24381 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
NTK
 Direct Fit 5-Wire A/F Sensor

NTK 24381 Air / Fuel Ratio Sensor - Upstream

Brand NTK 24381
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 17.8
Product line Direct Fit 5-Wire A/F Sensor
Fits Kia and Hyundai · 69 vehicles

Direct fit replacement. Specific-fit sensor for straightforward installation.

Heated sensor. Helps the system reach operating temperature quickly.

OE specifications. Extensively tested for quality and reliability.

Cross-references Baldwin 18104, DENSO Auto Parts 234-5029 and 392102G100 for the same application. See all 3.

$198.39Free shipping
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Order total $198.39
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Air / Fuel Ratio Sensor options

Direct-Fit Air/Fuel Ratio Sensor for Select Hyundai and Kia

NTK 24381 is a direct-fit heated air/fuel ratio sensor built for upstream Bank 1 Sensor 1 applications. It is engineered for specific-fit replacement on select Hyundai Sonata, Tucson, Santa Fe, and Kia Optima, Sorento, Sportage, Forte, Forte Koup, Forte5, and Rondo models.

Key Features

  • Direct-fit replacement air/fuel ratio sensor
  • Heated sensor design for faster operating temperature
  • Specific-fit application for easier OE-style replacement
  • 5-wire configuration
  • 18.000 mm thread diameter with 0.38 thread length
  • 17.8 wiring harness length
  • Upstream Bank 1 Sensor 1 placement

Product Details

NTK 24381 is part of the Direct Fit 5-Wire A/F Sensor line, a product line focused on OE-style replacement coverage for import and domestic vehicles. NTK uses ceramic sensor technology developed in-house and manufactures oxygen and air/fuel ratio sensors to meet original equipment fit, form, and function expectations. This sensor is a specific-fit, heated upstream unit for vehicles that require precise air/fuel monitoring at Bank 1 Sensor 1. It is a direct replacement for applications such as 2011-2016 Kia Optima, 2011-2015 Hyundai Sonata, and 2014-2015 Hyundai Tucson.

This part cross-references DENSO Auto Parts 234-5029 for the same application.

Common Issues This Sensor Can Address

  • Check engine light related to upstream air/fuel ratio sensor performance
  • Incorrect fuel trim readings from a failing Bank 1 Sensor 1 unit
  • Rough idle or hesitation caused by inaccurate exhaust feedback
  • Emissions test failure tied to sensor response issues
  • Slow sensor warm-up on heated sensor applications

Installation Notes

Verify the vehicle’s engine and emissions calibration before ordering, especially on California emissions applications. Confirm upstream Bank 1 Sensor 1 placement, connector style, and thread specifications before installation. Use proper sensor removal tools and follow the manufacturer service procedure to avoid damaging the exhaust bung or wiring harness.

Quality Assurance

NTK is a major original equipment oxygen sensor supplier and tests sensors during manufacturing to support consistent fit and reliable operation. NTK 24381 is built to OE specifications for the listed Hyundai and Kia applications.

Related reading

This part fits 69 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
2016KiaOptima—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015HyundaiSanta Fe Sport—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015HyundaiSonata—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015HyundaiTucson—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015KiaOptima—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015KiaSorento—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015KiaSportage—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014HyundaiSanta Fe Sport—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2014HyundaiSonata—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014HyundaiTucson—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014KiaOptima—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014KiaSorento—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014KiaSportage—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013HyundaiSanta Fe Sport—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013HyundaiSonata—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013HyundaiTucson—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013HyundaiTucsonAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForteAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForteAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte KoupAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte KoupAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte5Automatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaForte5Automatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaOptimaAutomatic2.4LL4GASUpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2013KiaOptima—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaSorento—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013KiaSportageAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012HyundaiSanta Fe—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012HyundaiSonata—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012HyundaiTucson—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012HyundaiTucsonAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForteAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForteAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte KoupAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte KoupAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte5Automatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaForte5Automatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaOptimaAutomatic2.4LL4GASUpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaOptima—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaRondo—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012KiaSorento—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012KiaSportageAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011HyundaiSanta Fe—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011HyundaiSonataAutomatic2.4LL4GASUpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011HyundaiSonata—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011HyundaiTucson—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011HyundaiTucsonAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForteAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForteAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForte KoupAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaForte KoupAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaOptimaAutomatic2.4LL4GASUpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaOptima—2.4LL4ELECTRIC/GASUpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaRondo—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011KiaSorento—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011KiaSportageAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010HyundaiSanta Fe—2.4LL4—UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2010HyundaiSonata—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010HyundaiTucsonAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForteAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForteAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForte KoupAutomatic2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaForte KoupAutomatic2.0LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2010KiaRondo—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2009HyundaiSonata—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2009KiaRondo—2.4LL4—UpstreamB1S1 California emissions Oxygen Sensor OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Baldwin — 18104DENSO Auto Parts — 234-5029392102G100