HomeEmission Control > SensorsNTK 23559 Oxygen Sensor - Downstream or Upstream
Part #: 23559

NTK 23559 Oxygen Sensor - Downstream or Upstream

Direct Fit Oxygen Sensor, Downstream
18 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Direct Fit Oxygen Sensor, Downstream
Fitment: Mitsubishi, Eagle, Dodge, and Plymouth, Eclipse, Talon, Stealth, 3000GT, Colt, Summit, and Diamante
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 23559

The NTK Direct Fit Oxygen Sensor 23559 is designed specifically for select Dodge and Mitsubishi vehicles, including models like the 3000GT, Colt, Diamante, Eclipse, and Stealth. 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 oxygen sensor for faster response times
  • Specific fit for Dodge and Mitsubishi models
  • Threaded mounting type with 18mm thread diameter
  • Four-wire design for reliable signal transmission
  • 15.75-inch wiring harness length for proper installation

Detailed Product Features and Specifications

The NTK 23559 oxygen sensor features a heated sensor type, which allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions sooner after engine start. Its specific fitment ensures compatibility with Dodge 3000GT and Mitsubishi models such as the Colt, Diamante, Eclipse, and Stealth, providing a direct replacement without modification. The sensor includes a threaded mounting type with an 18mm thread diameter, facilitating secure installation. The four-wire configuration supports both the sensor signal and heater circuit, while the 15.75-inch wiring harness length offers sufficient reach for proper connection within the engine bay.

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is engineered to provide precise fitment and reliable performance for specific vehicle applications. This product line focuses on delivering sensors that match OEM specifications, ensuring straightforward installation and consistent operation. The 23559 sensor is part of this line, designed to meet the exact requirements of select Dodge and Mitsubishi models, helping maintain proper emissions control and engine efficiency.

Common Applications and Issues Addressed

  • Replacement for faulty or failing oxygen sensors in Dodge 3000GT and Mitsubishi Colt, Diamante, Eclipse, and Stealth
  • Helps resolve rough idling and poor fuel economy caused by inaccurate air-fuel mixture readings
  • Reduces engine hesitation and stalling related to sensor malfunction
  • Assists in passing emissions tests by ensuring proper exhaust gas monitoring
  • Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

  • Ensure the vehicle is cool before sensor removal to avoid burns
  • Use appropriate oxygen sensor socket or wrench for removal and installation
  • Do not over-tighten; follow torque specifications for the 18mm threaded sensor
  • Check wiring harness length (15.75 inches) for proper routing and connection
  • Verify sensor compatibility with vehicle make and model before installation

Quality Assurance and Warranty

NTK oxygen sensors, including the 23559 part number, are manufactured to meet strict quality standards for durability and performance. This sensor undergoes rigorous testing to ensure reliable operation under various driving conditions. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.

BrandNTK
Part Number23559
PositionDirect Fit Oxygen Sensor, Downstream
Mounting TypeThreaded
Sensor TypeHeated
Thread Diameter18.000
Universal Or Specific FitSpecific
Wire Quantity4
Wiring Harness Length15.7500

This part fits 18 vehicles. Search below:

YearMakeModelDrive TypeLitersCylindersPositionNotes
1999MitsubishiEclipseAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
1998MitsubishiEclipseAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
1997MitsubishiEclipseAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
1996MitsubishiEclipseAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
1995DodgeStealth3.0LV6UpstreamB1S1 Oxygen Sensor for Federal Emissions with OE Equivalent Design; Direct Fit Oxygen Sensor
1995Mitsubishi3000GT3.0LV6UpstreamB1S1 Oxygen Sensor for Federal Emissions with OE Equivalent Design; Direct Fit Oxygen Sensor
1995MitsubishiEclipseAWD2.0LL4DownstreamDownstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor
1994DodgeStealth3.0LV6UpstreamB1S1 Oxygen Sensor for Federal Emissions with OE Equivalent Design; Direct Fit Oxygen Sensor
1994Mitsubishi3000GT3.0LV6UpstreamB1S1 Oxygen Sensor for Federal Emissions with OE Equivalent Design; Direct Fit Oxygen Sensor
1993DodgeColt2.4LL4DownstreamB1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor
1993DodgeStealth3.0LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
1993Mitsubishi3000GT3.0LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
1993MitsubishiDiamante3.0LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
1992DodgeStealth3.0LV6UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
1992Mitsubishi3000GT3.0LV6UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
1992MitsubishiDiamante3.0LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor
1991DodgeStealth3.0LV6UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
1991Mitsubishi3000GT3.0LV6UpstreamBank 1 Sensor 1 Oxygen Sensor; 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:

1342813805138121382815338213-1340234-4027234-4640234-4642234-488975-176375-195375-237675-2583ES10196ES10719ES20078MD165083MD177968MD185335MD186990OS1445OS157OS1877OS896SG1123SG311SG400SG692

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