Delphi ES20012 Oxygen Sensor - Front or Rear
OE Quality 60-Day Returns
Delphi

Delphi ES20012 Oxygen Sensor - Front or Rear

Brand Delphi ES20012
Position Rear
Connector Shape Triangle
Overall Length 520.0
Package Contents Oxygen Sensor, Instruction Sheet
Position(s) Front, Rear. For the position specific to your vehicle, refer to the Application tab.
Sensor Type Heated
Thread Size 18 x 1.5 mm
Wire Quantity 4
Fits Chevrolet, GMC, Buick, Cadillac, and Saturn · 92 vehicles

Heated sensor. Provides faster operation for more responsive emissions monitoring.

Triangle connector. Helps ensure a secure, straightforward electrical connection.

OE heritage. Built with 100 years of original-equipment experience.

Cross-references BBB Industries 16717, Bosch 16070 and Bosch 16089 for the same application. See all 54.

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Delphi ES20012 Oxygen Sensor Overview

The Delphi ES20012 is a heated oxygen sensor built for emission control service on a wide range of GM vehicles. It draws on Delphi’s OE heritage and decades of supplier experience, with the sensor design and materials selected to support accurate exhaust feedback in front or rear locations where specified.

Compatible With Chevrolet Equinox, GMC Terrain, Buick LaCrosse, Cadillac SRX, and related applications, this Delphi oxygen sensor is a direct-fit replacement for many 2004-2017 vehicles. The ES20012 part number is commonly searched for front and rear oxygen sensor replacement on GM crossover, sedan, and hybrid applications.

Key Features

  • Heated oxygen sensor for faster operating temperature and stable signal output
  • 4-wire design for signal and heater circuit operation
  • Triangle connector shape for application-specific OE-style connection
  • 18 x 1.5 mm thread size for direct exhaust bung fitment
  • Overall length: 520.0
  • Package contents: oxygen sensor and instruction sheet
  • Position-specific coverage for front and rear locations, depending on vehicle application

Detailed Description

Delphi ES20012 is an emission control oxygen sensor engineered for vehicles that rely on precise exhaust oxygen monitoring to manage fuel delivery and emissions performance. As a heated sensor, it reaches operating temperature quickly, helping the engine control system respond sooner after startup. The ES20012 part number is used across multiple GM platforms, including Chevrolet Equinox, GMC Terrain, Buick LaCrosse, and Cadillac SRX applications, with fitment that also extends to Chevrolet Traverse, GMC Acadia, Saturn Outlook, and select Cadillac, Buick, and Chevrolet models.

This part cross-references Bosch 16070 for the same application. Delphi’s OE background is reflected in the sensor’s construction and application coverage, making it a practical replacement choice when servicing front or rear oxygen sensor locations on compatible vehicles.

Common Problems This Sensor Can Address

  • Check engine light related to oxygen sensor performance
  • Rough idle or inconsistent air-fuel feedback
  • Reduced fuel economy caused by inaccurate exhaust readings
  • Emission test failure tied to sensor response issues
  • Slow sensor warm-up or heater circuit faults

Installation Notes and Tips

  • Verify the exact sensor position for your vehicle before ordering; this part is used in front and rear locations depending on application.
  • Confirm connector shape, wire count, and thread size against the original sensor before installation.
  • Inspect the exhaust bung threads and wiring routing during replacement to avoid damage to the new sensor.
  • Use the vehicle application data to match the correct ES20012 placement on Chevrolet Equinox, GMC Terrain, Buick LaCrosse, and Cadillac SRX models.

Quality Assurance

Delphi builds aftermarket parts using OE experience and supplier knowledge developed over many years of original equipment service. The ES20012 reflects that background with application-specific fitment and sensor construction intended for emission control service.

Related reading

This part fits 92 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelFuel TypePositionNotes
2017ChevroletEquinox——N/A—
2017GMCTerrain——N/A—
2016BuickLaCrosse——N/A—
2016CadillacSRX—FLEXN/A—
2016ChevroletEquinox——N/A—
2016ChevroletImpala Limited——N/A—
2016GMCTerrain——N/A—
2015BuickLaCrosse——N/A—
2015CadillacELR——Rear—
2015CadillacSRX——N/A—
2015ChevroletEquinox——N/A—
2015ChevroletImpala Limited——N/A—
2015ChevroletVolt——Rear—
2015GMCTerrain——N/A—
2014BuickLaCrosse——N/A—
2014CadillacELR——Rear—
2014CadillacSRX——N/A—
2014ChevroletEquinox——N/A—
2014ChevroletImpala Limited——N/A—
2014ChevroletVolt——Rear—
2014GMCTerrain——N/A—
2013BuickLaCrosse——N/A—
2013CadillacSRX——N/A—
2013ChevroletEquinox——N/A—
2013ChevroletImpala——Rear—
2013ChevroletImpala——Front—
2013ChevroletVolt——Rear—
2013GMCTerrain——N/A—
2012BuickLaCrosse——N/A—
2012CadillacSRX——N/A—
2012ChevroletCaptiva Sport——N/A—
2012ChevroletEquinox——Rear—
2012ChevroletEquinox——Front—
2012ChevroletImpalaLTZ—Rear—
2012ChevroletImpalaLTZ—Front—
2012ChevroletImpalaLT—Rear—
2012ChevroletImpalaLT—Front—
2012ChevroletImpalaLS—Rear—
2012ChevroletImpalaLS—Front—
2012ChevroletVolt——Rear—
2012GMCTerrain——N/A—
2011BuickEnclave——Rear—
2011BuickEnclave——Front—
2011BuickLaCrosse——Rear—
2011BuickLaCrosse——Front—
2011CadillacSRX—GASRear—
2011CadillacSRX—GASFront—
2011CadillacSRX——Rear—
2011CadillacSRX——Front—
2011ChevroletEquinox——Rear—
2011ChevroletEquinox——Front—
2011ChevroletTraverse——Rear—
2011ChevroletTraverse——Front—
2011ChevroletVolt——Rear—
2011GMCAcadia——Rear—
2011GMCAcadia——Front—
2011GMCTerrain——Rear—
2011GMCTerrain——Front—
2010BuickEnclave——Rear—
2010BuickEnclave——Front—
2010BuickLaCrosse——Rear—
2010BuickLaCrosse——Front—
2010CadillacSRX——Rear—
2010CadillacSRX——Front—
2010ChevroletEquinox——Rear—
2010ChevroletEquinox——Front—
2010ChevroletTraverse——Rear—
2010ChevroletTraverse——Front—
2010GMCAcadia——Rear—
2010GMCAcadia——Front—
2010GMCTerrain——Rear—
2010GMCTerrain——Front—
2010SaturnOutlookXE—Rear—
2010SaturnOutlookXE—Front—
2009BuickEnclave——Rear—
2009BuickEnclave——Front—
2009ChevroletTraverse——Rear—
2009ChevroletTraverse——Front—
2009GMCAcadia——Rear—
2009GMCAcadia——Front—
2009SaturnOutlook——Rear—
2009SaturnOutlook——Front—
2008BuickLaCrosse——Rear—
2007BuickLaCrosse——Rear—
2006BuickLaCrosse——Rear—
2006BuickRendezvous——Rear—
2005BuickLaCrosse——Rear—
2005BuickRendezvous——Rear—
2005CadillacXLR——Rear1st Design
2004CadillacCTS——Rear—
2004CadillacSRX——Rear—
2004CadillacXLR——Rear—
Directly replaces or cross-references 54 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 16717Bosch — 16070Bosch — 16089Bosch — 16454Bosch — 16532Carlson — 16088DENSO Auto Parts — 234-4669DENSO Auto Parts — 234-4815DENSO Auto Parts — 234-4816Gates — 21556Quality-Built — 15494Quality-Built — 167265S81215S81435S81495S8199234-45642131559213157321316952132821213282221331372134203213440621344072134553125670721257565812584050125870371258753312607333126124301261612512634061155756582502464989017722OS2213OS2385OS2415OS2450REA1810REA1855REA1882SG1380SG1552SG1582SG1613SU9587SU9609SU9615SU9665