Delphi ES20002 Oxygen Sensor - Center, Front Right, Rear or Rear Right
OE Quality 60-Day Returns
Delphi

Delphi ES20002 Oxygen Sensor - Center, Front Right, Rear or Rear Right

Brand Delphi ES20002
Position Rear
Connector Shape Square
Overall Length 320.0
Package Contents Oxygen Sensor, Instruction Sheet
Position(s) Center, Front Right, Rear, Rear Right. 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 Buick, Chevrolet, Oldsmobile, Pontiac, GMC, and Isuzu · 180 vehicles

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

Square connector. Simplifies installation with a straightforward plug-in connection.

OE heritage. Built with 100 years of OE experience and supplier knowledge.

Cross-references BBB Industries 11170, Bosch 13444 and DENSO Auto Parts 234-4025 for the same application. See all 51.

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Delphi ES20002 Oxygen Sensor Overview

The Delphi ES20002 is a heated oxygen sensor built for rear and front-right applications on a wide range of GM and Isuzu vehicles. It uses OE-based engineering from Delphi’s long history supplying original equipment parts, giving you a direct-fit replacement for emissions and fuel-control service.

Compatible with vehicles such as the Buick Regal, Chevrolet Camaro, Pontiac Firebird, and Chevrolet Impala, this Delphi ES20002 oxygen sensor is a practical choice when you need accurate exhaust feedback and a proper factory-style connection.

Key Features

  • Heated oxygen sensor for faster operating temperature and stable signal output
  • 4-wire design for common OE-style sensor circuits
  • Square connector shape for application-specific fitment
  • 18 x 1.5 mm thread size for direct exhaust installation
  • Overall length: 320.0
  • Package contents: oxygen sensor and instruction sheet
  • Position coverage includes center, front right, rear, and rear right applications

Detailed Description

Delphi ES20002 is an emission control oxygen sensor engineered for vehicles that require a heated, threaded exhaust sensor with a square connector. Delphi draws on OE heritage and supplier experience to build aftermarket parts with the same application-focused design approach used for original equipment service. This part cross-references Bosch 13444 and DENSO Auto Parts 234-4025 for the same application. The ES20002 is used across many rear sensor locations on GM platforms, including Buick Century, Buick LeSabre, Chevrolet Monte Carlo, Pontiac Bonneville, and Oldsmobile Aurora, as well as select front-right and rear-right positions on Camaro and Firebird models.

What This Sensor Helps Address

  • Check engine light caused by a failing oxygen sensor
  • Rough idle or inconsistent air-fuel feedback from an aging sensor
  • Reduced fuel-control accuracy from slow sensor response
  • Emissions test failures related to exhaust monitoring faults
  • Corrosion or connector damage at the original sensor location

Installation Notes and Tips

Confirm the exact position before ordering, since this part is listed for rear, front right, rear right, and center locations depending on vehicle application. Verify the 4-wire connector, square plug shape, and 18 x 1.5 mm thread size against the original sensor. For fitment reference, this part fits 1996-2004 Chevrolet Impala, rear; fits 1998-2002 Chevrolet Camaro, front right; and fits 1996-2003 Buick Regal, rear. Additional coverage includes 1997-2003 GMC Sonoma, rear, and 1996-2002 Pontiac Firebird, rear. Use the vehicle application data to match the correct sensor position before installation.

Quality Assurance

Delphi builds this sensor using OE experience and application knowledge developed through decades of original equipment supply. The ES20002 is designed as a direct replacement for the listed applications and includes an instruction sheet for installation reference.

Related reading

This part fits 180 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelPositionNotes
2004BuickCentury—Rear—
2004BuickRendezvous—Rear—
2004ChevroletImpala—Rear—
2004ChevroletMonte Carlo—Rear—
2004OldsmobileSilhouette—Rear—
2004PontiacAztek—Rear—
2004PontiacMontana—Rear—
2003BuickCentury—Rear—
2003BuickLeSabre—Rear—
2003BuickPark Avenue—Rear—
2003BuickRegal—Rear—
2003BuickRendezvous—Rear—
2003ChevroletImpala—Rear—
2003ChevroletMonte Carlo—Rear—
2003ChevroletS10—Rear—
2003GMCSonoma—Rear—
2003OldsmobileSilhouette—Rear—
2003PontiacAztek—Rear—
2003PontiacBonneville—Rear—
2003PontiacGrand Prix—Rear—
2003PontiacMontana—Rear—
2002BuickCentury—Rear—
2002BuickLeSabre—Rear—
2002BuickPark Avenue—Rear—
2002BuickRegal—Rear—
2002BuickRendezvous—Rear—
2002ChevroletCamaro—Front Right—
2002ChevroletCamaro—Rear—
2002ChevroletImpala—Rear—
2002ChevroletMonte Carlo—Rear—
2002ChevroletS10—Rear—
2002GMCSonoma—Rear—
2002OldsmobileSilhouette—Rear—
2002PontiacAztek—Rear—
2002PontiacBonneville—Rear—
2002PontiacFirebird—Front Right—
2002PontiacFirebird—Rear—
2002PontiacGrand Prix—Rear—
2002PontiacMontana—Rear—
2001BuickCentury—Rear—
2001BuickLeSabre—Rear—
2001BuickPark Avenue—Rear—
2001BuickRegal—Rear—
2001ChevroletCamaro—Front Right—
2001ChevroletCamaro—Rear—
2001ChevroletImpala—Rear—
2001ChevroletLumina—Rear—
2001ChevroletMonte Carlo—Rear—
2001ChevroletS10—Rear—
2001GMCSonoma—Rear—
2001OldsmobileSilhouette—Rear—
2001PontiacAztek—Rear—
2001PontiacBonneville—Rear—
2001PontiacFirebird—Front Right—
2001PontiacFirebird—Rear—
2001PontiacGrand Prix—Rear—
2001PontiacMontana—Rear—
2000BuickCentury—Rear—
2000BuickLeSabre—Rear—
2000BuickPark Avenue—Rear—
2000BuickRegal—Rear—
2000ChevroletCamaro—Front Right—
2000ChevroletCamaro—Rear—
2000ChevroletImpala—Rear—
2000ChevroletLumina—Rear—
2000ChevroletMonte Carlo—Rear—
2000ChevroletS10—Rear—
2000GMCSonoma—Rear—
2000IsuzuHombre—Rear—
2000OldsmobileSilhouette—Rear—
2000PontiacBonneville—Rear—
2000PontiacFirebird—Front Right—
2000PontiacFirebird—Rear—
2000PontiacGrand Prix—Rear—
2000PontiacMontana—Rear—
1999BuickCentury—Rear—
1999BuickLeSabre—Rear—
1999BuickPark Avenue—Rear—
1999BuickRegal—Rear—
1999BuickRiviera—Rear—
1999ChevroletCamaro—Rear Right—
1999ChevroletCamaro—Front Right—
1999ChevroletCamaro—Rear—
1999ChevroletLumina—Rear—
1999ChevroletMonte Carlo—Rear—
1999ChevroletS10—Rear—
1999GMCSonoma—Rear—
1999IsuzuHombre—Rear—
1999Oldsmobile88—Rear—
1999OldsmobileAurora—Rear—
1999OldsmobileIntrigue—Rear—
1999OldsmobileLSS—Rear—
1999OldsmobileSilhouette—Rear—
1999PontiacBonneville—Rear—
1999PontiacFirebird—Rear Right—
1999PontiacFirebird—Front Right—
1999PontiacFirebird—Rear—
1999PontiacGrand Prix—Rear—
1999PontiacMontana—Rear—
1998BuickCentury—Rear—
1998BuickLeSabre—Rear—
1998BuickPark Avenue—Rear—
1998BuickRegal—Rear—
1998BuickRiviera—Rear—
1998ChevroletCamaro—Rear Right—
1998ChevroletCamaro—Front Right—
1998ChevroletCamaro—Rear—
1998ChevroletLuminaLTZRear—
1998ChevroletLumina—Rear—
1998ChevroletMonte Carlo—Rear—
1998ChevroletS10—Rear—
1998GMCSonoma—Rear—
1998IsuzuHombre—Rear—
1998Oldsmobile88—Rear—
1998OldsmobileAurora—Rear—
1998OldsmobileIntrigue—Rear—
1998OldsmobileLSS—Rear—
1998OldsmobileRegency—Rear—
1998OldsmobileSilhouette—Rear—
1998PontiacBonneville—Rear—
1998PontiacFirebird—Rear Right—
1998PontiacFirebird—Front Right—
1998PontiacFirebird—Rear—
1998PontiacGrand Prix—Rear—
1998PontiacTrans Sport—Rear—
1997BuickCentury—Rear—
1997BuickLeSabre—Rear—
1997BuickPark Avenue—Rear—
1997BuickRegal—Rear—
1997BuickRiviera—Rear—
1997ChevroletCamaro—Rear—
1997ChevroletCamaro—Center—
1997ChevroletLumina—Rear—
1997ChevroletMonte Carlo—Rear—
1997ChevroletS10—Rear—
1997GMCSonoma—Rear—
1997IsuzuHombre—Rear—
1997Oldsmobile88—Rear—
1997OldsmobileAurora—Rear—
1997OldsmobileAurora—Center—
1997OldsmobileCutlass Supreme—Rear—
1997OldsmobileLSS—Rear—
1997OldsmobileRegency—Rear—
1997OldsmobileSilhouette—Rear—
1997PontiacBonneville—Rear—
1997PontiacFirebird—Rear—
1997PontiacFirebird—Center—
1997PontiacGrand Prix—Rear—
1997PontiacTrans Sport—Rear—
1996BuickCentury—Rear—
1996BuickLeSabre—Rear—
1996BuickPark Avenue—Rear—
1996BuickRegal—Rear—
1996BuickRiviera—Rear—
1996ChevroletCamaro—Rear—
1996ChevroletCamaro—Center—
1996ChevroletLumina—Rear—
1996ChevroletLumina APV—Rear—
1996ChevroletMonte Carlo—Rear—
1996Oldsmobile88—Rear—
1996Oldsmobile98—Rear—
1996OldsmobileAurora—Rear—
1996OldsmobileAurora—Center—
1996OldsmobileCutlass Ciera—Rear—
1996OldsmobileCutlass Supreme—Rear—
1996OldsmobileLSS—Rear—
1996OldsmobileSilhouette—Rear—
1996PontiacBonneville—Rear—
1996PontiacFirebird—Rear—
1996PontiacFirebird—Center—
1996PontiacGrand Prix—Rear—
1996PontiacTrans Sport—Rear—
1993ChevroletS10ELRear—
1992ChevroletS10TahoeRear—
1992ChevroletS10ELRear—
1991ChevroletS10TahoeRear—
1990ChevroletS10TahoeRear—
1990ChevroletS10DurangoRear—
1990GMCS15Sierra ClassicRear—
1990GMCS15High SierraRear—
Directly replaces or cross-references 51 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 11170Bosch — 13444DENSO Auto Parts — 234-4025DENSO Auto Parts — 234-4087Gates — 21528Gates — 21544Standard Ignition — SG2775S31165S31195S31255S31265S81345S81518-12587-214-08-19178-924-08-25164-983-08-25312-207-0138-217138-266138-75221316811257845912587214191787471917892219178924250243402513219625132207251611302516498325312196253122072531832125327815AFS97AFS116AFS123AFS141DY-731DY-734DY-776FE6085OS229OS825OS1072REA1010SU1087SU1189SU1295SU1299