HomeEmission Control > SensorsNTK 23550 Oxygen Sensor - Upstream or Upstream Right
Part #: 23550

NTK 23550 Oxygen Sensor - Upstream or Upstream Right

Direct Fit Oxygen Sensor, Upstream
21 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, Upstream
Fitment: Mitsubishi, Lancer, Montero, and Montero Sport
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Overview of NTK Direct Fit Oxygen Sensor 23550

The NTK Direct Fit Oxygen Sensor 23550 is designed specifically for Mitsubishi vehicles, including the Lancer, Montero, and Montero Sport models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data.

  • Heated sensor type for faster response times
  • Specific fit for Mitsubishi Lancer, Montero, and Montero Sport
  • 28.5-inch wiring harness length for easy installation
  • Threaded mounting type with 18mm thread diameter
  • Four-wire configuration for reliable signal transmission

Details on the Direct Fit Oxygen Sensor Line

The NTK Direct Fit Oxygen Sensor product line focuses on providing exact replacement sensors tailored to specific vehicle makes and models. This approach eliminates the need for modifications during installation and ensures compatibility with the vehicle’s existing wiring and mounting points. The 23550 part number is part of this line, offering a precise fit and reliable performance for Mitsubishi vehicles.

Product Features and Specifications

This oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving emissions control efficiency. The 28.5-inch wiring harness length provides sufficient reach for straightforward connection without excess slack. The sensor’s threaded mounting type with an 18mm diameter ensures secure installation in the exhaust system. With four wires, this sensor supports both the heater circuit and signal output, maintaining accurate communication with the engine control unit.

Common Applications and Issues Addressed

  • Restores proper air-fuel ratio monitoring for Mitsubishi Lancer, Montero, and Montero Sport
  • Helps resolve check engine light triggers related to oxygen sensor faults
  • Improves fuel efficiency by providing accurate oxygen level readings
  • Reduces harmful emissions by ensuring correct sensor operation
  • Prevents engine performance issues caused by faulty oxygen sensors

Installation Notes and Tips

When installing the NTK 23550 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the wiring harness length and connector compatibility before installation. Tighten the sensor to the manufacturer’s torque specifications to prevent exhaust leaks.

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet OEM standards for fit, form, and function. The Direct Fit Oxygen Sensor 23550 undergoes rigorous testing to ensure durability and reliable performance. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship to provide confidence in the product’s quality.

BrandNTK
Part Number23550
PositionDirect Fit Oxygen Sensor, Upstream
Mounting TypeThreaded
Sensor TypeHeated
Thread Diameter18.000
Universal Or Specific FitSpecific
Wire Quantity4
Wiring Harness Length28.5000

This part fits 21 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2006MitsubishiLancer2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2006MitsubishiMontero3.8LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2005MitsubishiLancer2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2005MitsubishiMontero3.8LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2004MitsubishiLancer2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2004MitsubishiMontero3.8LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2004MitsubishiMontero Sport3.5LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2003MitsubishiLancer2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2003MitsubishiMontero3.8LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2003MitsubishiMontero Sport3.5LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2003MitsubishiMontero Sport3.0LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2002MitsubishiMontero3.5LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2002MitsubishiMontero Sport3.5LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2002MitsubishiMontero Sport3.0LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2001MitsubishiMontero3.5LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2001MitsubishiMontero Sport3.5LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2001MitsubishiMontero Sport3.0LV6Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
2000MitsubishiMontero Sport3.5LV6Upstream RightCalif. Emissions; OE Equivalent Design; Direct Fit Oxygen Sensor
2000MitsubishiMontero Sport3.0LV6Upstream RightCalif. Emissions; OE Equivalent Design; Direct Fit Oxygen Sensor
1999MitsubishiMontero Sport3.5LV6Upstream RightCalif. Emissions; OE Equivalent Design; Direct Fit Oxygen Sensor
1999MitsubishiMontero Sport3.0LV6Upstream RightCalif. 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:

1519315589155961560015604156151588A064234-474175-307275-307975-308375-308775-309875-3737ES20225MD360182MD365014MN153010MN158670MN158918OS5335SG1456SG1460

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