NTK 24399 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
NTK
 Direct Fit 5-Wire A/F Sensor

NTK 24399 Air / Fuel Ratio Sensor - Upstream

Brand NTK 24399
Position Upstream
Wiring Harness Length 40.5
Sensor Type Heated
Thread Length 0.38
Universal Or Specific Fit Specific
Wire Quantity 5
Thread Diameter 18.000
Mounting Bracket Included No
Product line Direct Fit 5-Wire A/F Sensor
Fits Mitsubishi · 41 vehicles

Direct fit. Specific-fit sensor for straightforward replacement.

Heated sensor. Helps reach operating temperature quickly for reliable readings.

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

Cross-references DENSO Auto Parts 234-5051 and 1588A228 for the same application. See all 2.

$492.72Free shipping
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Order total $492.72
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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

NTK Direct Fit A/F Sensor for Mitsubishi

NTK Part Number 24399 is a direct fit heated air/fuel ratio sensor built for specific Mitsubishi upstream applications. It uses a 5-wire configuration and OE-style fit, form, and function for accurate replacement on Mitsubishi Outlander Sport, RVR, Lancer, and Outlander models.

Key Features

  • Direct Fit 5-Wire A/F Sensor for specific Mitsubishi applications
  • Heated sensor design for faster operating temperature
  • 5-wire construction with a 40.5 in. wiring harness length
  • 18.000 mm thread diameter and 0.38 in. thread length
  • Specific fit replacement for upstream sensor locations
  • OE-style engineering from NTK, the Sensor Specialist

Product Details

NTK 24399 is part of the Direct Fit 5-Wire A/F Sensor line, created for applications that require a precise replacement sensor without modification. NTK is a major original equipment oxygen sensor supplier, and this sensor reflects that OE-focused approach with controlled ceramic manufacturing, extensive testing, and application-specific design. It is built for upstream use on Mitsubishi vehicles, including 2011-2013 Mitsubishi Outlander, 2012-2017 Mitsubishi Lancer, 2013 Mitsubishi Outlander Sport, 2013 Mitsubishi RVR, 2015-2018 Mitsubishi Outlander Sport, 2015-2018 Mitsubishi RVR, and 2019-2021 Mitsubishi Outlander Sport and RVR. This part cross-references DENSO Auto Parts 234-5051 for the same application.

What This Sensor Helps Address

  • Check engine light related to air/fuel ratio sensor performance
  • Incorrect upstream sensor readings affecting fuel control
  • Rough idle or drivability issues tied to sensor signal problems
  • Failed emissions inspection caused by a faulty sensor
  • OE replacement needs on Mitsubishi Outlander Sport, RVR, Lancer, or Outlander

Installation Notes

Install this sensor in the upstream position only where listed in the fitment data. Verify the connector, thread size, and harness routing before installation. The sensor is specific fit, so it is not a universal replacement. No mounting bracket is included.

Quality Assurance

NTK manufactures oxygen and air/fuel ratio sensors with OE application coverage and testing that meets or exceeds original equipment specifications. The brand’s ceramics expertise and production controls support consistent sensor performance for import and domestic vehicle service.

Related reading

This part fits 41 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2021MitsubishiOutlander Sport2.4LL4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021MitsubishiRVR2.4LL4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020MitsubishiOutlander Sport2.4LL4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020MitsubishiRVR2.4LL4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019MitsubishiOutlander Sport2.4LL4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019MitsubishiRVR2.4LL4UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2018MitsubishiOutlander Sport2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2018MitsubishiOutlander Sport2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2018MitsubishiRVR2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2018MitsubishiRVR2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2017MitsubishiLancer2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2017MitsubishiLancer2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2017MitsubishiOutlander Sport2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2017MitsubishiOutlander Sport2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2017MitsubishiRVR2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2017MitsubishiRVR2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2016MitsubishiLancer2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2016MitsubishiLancer2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2016MitsubishiOutlander Sport2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2016MitsubishiRVR2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015MitsubishiLancer2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015MitsubishiLancer2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015MitsubishiOutlander Sport2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2015MitsubishiRVR2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014MitsubishiLancer2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2014MitsubishiLancer2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013MitsubishiLancer2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013MitsubishiLancer2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013MitsubishiOutlander2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013MitsubishiOutlander Sport2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2013MitsubishiRVR2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012MitsubishiLancer2.4LL4UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012MitsubishiLancer2.0LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012MitsubishiOutlander2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2012MitsubishiOutlander Sport2.0LL4UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2012MitsubishiRVR2.0LL4UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011MitsubishiLancer2.4LL4UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011MitsubishiLancer2.0LL4UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011MitsubishiOutlander2.4LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2011MitsubishiOutlander Sport2.0LL4UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2011MitsubishiRVR2.0LL4UpstreamB1S1; Federal Emissions; OE MFR: NTK; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
DENSO Auto Parts — 234-50511588A228