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Standard Ignition NOX055 Nitrogen Oxide (NOx) Sensor - DownstreamOE Quality 60-Day Returns
Part #: NOX055

Standard Ignition NOX055 Nitrogen Oxide (NOx) Sensor - Downstream

Downstream
4 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Chevrolet and GMC, Equinox and Terrain
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Not what you need? See all Nitrogen Oxide (NOx) Sensor options

Downstream NOx Sensor for GM Diesel Emissions Control

Standard Ignition NOX055 is a downstream nitrogen oxide sensor for select 2018-2019 Chevrolet Equinox and 2018-2019 GMC Terrain applications. It uses a female 6-pin terminal layout with a rectangular/oval connector shape for a direct-fit emissions system repair.

Key Features

  • Nitrogen oxide (NOx) sensor for emission control system monitoring
  • Downstream position application
  • Female connector with 1 connector interface
  • 6 female pin terminals
  • Rectangular and oval connector shape
  • Standard Ignition part number NOX055

Detailed Description

Standard Ignition NOX055 is built for downstream NOx sensing on 2018-2019 Chevrolet Equinox and 2018-2019 GMC Terrain models. As part of the emission control system, the sensor helps the vehicle’s control strategy monitor nitrogen oxide levels after exhaust treatment, supporting accurate emissions feedback and system operation. This part cross-references DNX055 for the same application.

Common Issues This Part Can Address

  • Check engine light related to NOx sensor performance
  • Emission system fault codes tied to downstream exhaust monitoring
  • Incorrect nitrogen oxide readings from a failing sensor
  • Reduced emissions system efficiency caused by sensor signal problems
  • Inspection or emissions test failures linked to sensor faults

Installation Notes and Tips

Verify the downstream sensor location before replacement and confirm connector style, terminal count, and terminal gender match the original unit. For 2018-2019 Chevrolet Equinox and 2018-2019 GMC Terrain, compare the existing harness connection and exhaust routing before installation. Clear diagnostic trouble codes after installation and recheck system operation.

Quality Assurance

Standard Ignition supplies OE-style replacement emission control components for service applications. NOX055 is engineered to match the listed fitment and connector configuration for direct replacement use on the specified vehicles.

BrandStandard Ignition
Part NumberNOX055
Connector GenderFemale
Connector Quantity1
Connector ShapeRectangular, oval
Terminal GenderFemale
Terminal Quantity6
Terminal TypePin

This part fits 4 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2019ChevroletEquinox1.6LL4Downstream
2019GMCTerrain1.6LL4Downstream
2018ChevroletEquinox1.6LL4Downstream
2018GMCTerrain1.6LL4Downstream

* 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:

55501907DNX055DNX502NOX055

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

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