Delphi ES20321 Oxygen Sensor - Front or Rear

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Delphi ES20321 Oxygen Sensor - Front or Rear

Brand	Delphi ES20321
Position	Rear
Connector Shape	Round
Overall Length	325.0
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	Chrysler, Dodge, Jeep, and Plymouth · 115 vehicles

Heated sensor. Helps the oxygen sensor reach operating temperature quickly.

Round connector. Simplifies hookup with a clean, secure electrical connection.

OE heritage. Built with decades of original-equipment experience.

Cross-references BBB Industries 11144, BBB Industries 11162 and Bosch 13138 for the same application. See all 93.

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OE-Style Oxygen Sensor for Chrysler and Dodge

Delphi ES20321 is a heated oxygen sensor built for direct replacement service on a wide range of Chrysler, Dodge, Jeep, and Plymouth applications. It uses a 4-wire design with a round connector and 18 x 1.5 mm thread size for common exhaust sensor mounting points.

With OE heritage behind the design, this sensor is suited for front or rear positions depending on the vehicle application. It is a practical choice for Chrysler 300M, Dodge Intrepid, and Jeep Cherokee oxygen sensor replacement needs where accurate exhaust feedback is required.

Key Features

Heated oxygen sensor for faster operating temperature
4-wire configuration for common factory-style wiring layouts
Round connector shape
18 x 1.5 mm thread size
Overall length: 325.0
Includes oxygen sensor and instruction sheet
Fits front and rear positions, depending on application

Detailed Description

Delphi ES20321 is an emission control sensor engineered from OE-focused experience and aftermarket application knowledge. It is used to monitor exhaust oxygen content so the engine control system can adjust fuel delivery and maintain proper emissions performance. This part number, ES20321, is listed across multiple Chrysler, Dodge, Jeep, and Plymouth platforms, including 1999-2004 Chrysler 300M rear and front applications, 1998-2004 Chrysler Concorde rear and front applications, and 1996-2000 Jeep Cherokee rear applications.

This part cross-references Bosch 13138 and DENSO Auto Parts 234-4008 for the same application.

What It Helps Address

Check engine light related to oxygen sensor performance
Incorrect air-fuel mixture readings
Reduced fuel control accuracy from a worn sensor
Emissions test failures tied to sensor response issues
Slow sensor warm-up on heated oxygen sensor circuits

Installation Notes and Tips

Verify the exact position before ordering; ES20321 is used in both front and rear locations depending on vehicle and engine setup.
Confirm thread size and connector style match the original sensor before installation.
Review the application details for notes such as Next Generation Engine Control Module, ULEV, TLEV, or cylinder-specific coverage.
Inspect the harness routing and connector condition before connecting the new sensor.
Use the vehicle application tab to confirm the correct Chrysler 300M, Dodge Stratus, or Jeep Cherokee placement.

Quality Assurance

Delphi draws on more than a century of OE experience and supplier knowledge used by major automakers. That OE-focused background is built into this aftermarket oxygen sensor for consistent fitment and dependable emissions-system service.

This part fits 115 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Position	Notes
2004	Chrysler	300M	—	Rear	—
2004	Chrysler	Concorde	—	Rear	—
2004	Chrysler	Sebring	—	Rear	Except Next Generation Engine Control Module
2004	Chrysler	Sebring	—	Front	Except Next Generation Engine Control Module
2004	Dodge	Intrepid	—	Rear	—
2004	Dodge	Stratus	—	Rear	Except Next Generation Engine Control Module
2004	Dodge	Stratus	—	Front	Except Next Generation Engine Control Module
2003	Chrysler	300M	—	Rear	—
2003	Chrysler	Concorde	—	Rear	—
2003	Chrysler	Sebring	—	Rear	—
2003	Chrysler	Sebring	—	Front	—
2003	Dodge	Intrepid	—	Rear	—
2003	Dodge	Stratus	—	Rear	—
2003	Dodge	Stratus	—	Front	—
2002	Chrysler	300M	—	Rear	—
2002	Chrysler	Concorde	—	Rear	—
2002	Chrysler	Prowler	—	Rear	—
2002	Chrysler	Prowler	—	Front	—
2002	Chrysler	Sebring	—	Rear	—
2002	Chrysler	Sebring	—	Front	—
2002	Dodge	Intrepid	—	Rear	—
2002	Dodge	Stratus	—	Rear	—
2002	Dodge	Stratus	—	Front	—
2001	Chrysler	300M	—	Rear	—
2001	Chrysler	300M	—	Front	—
2001	Chrysler	Concorde	—	Rear	—
2001	Chrysler	Concorde	—	Front	—
2001	Chrysler	LHS	—	Rear	—
2001	Chrysler	LHS	—	Front	—
2001	Chrysler	Prowler	—	Rear	—
2001	Chrysler	Prowler	—	Front	—
2001	Chrysler	Sebring	—	Rear	—
2001	Chrysler	Sebring	—	Front	—
2001	Dodge	Intrepid	SE	Rear	—
2001	Dodge	Intrepid	SE	Front	—
2001	Dodge	Intrepid	—	Rear	—
2001	Dodge	Intrepid	—	Front	—
2001	Dodge	Stratus	—	Rear	—
2001	Dodge	Stratus	—	Front	—
2001	Jeep	Cherokee	—	Rear	Cylinders 1 through 6
2001	Plymouth	Prowler	—	Rear	—
2001	Plymouth	Prowler	—	Front	—
2000	Chrysler	300M	—	Rear	—
2000	Chrysler	300M	—	Front	—
2000	Chrysler	Cirrus	—	Front	—
2000	Chrysler	Concorde	—	Rear	—
2000	Chrysler	Concorde	—	Front	—
2000	Chrysler	LHS	—	Rear	—
2000	Chrysler	LHS	—	Front	—
2000	Dodge	Dakota	—	Rear	—
2000	Dodge	Dakota	Base	Rear	—
2000	Dodge	Durango	Base	Rear	—
2000	Dodge	Durango	—	Rear	—
2000	Dodge	Intrepid	—	Rear	—
2000	Dodge	Intrepid	—	Front	—
2000	Dodge	Neon	—	Rear	Ultra Low Emission Vehicle (ULEV)
2000	Dodge	Stratus	—	Front	—
2000	Jeep	Cherokee	—	Rear	Cylinders 1 through 6
2000	Jeep	Cherokee	—	Rear	—
2000	Jeep	Wrangler	—	Rear	Cylinders 1 through 6
2000	Plymouth	Breeze	—	Front	—
2000	Plymouth	Neon	—	Rear	Ultra Low Emission Vehicle (ULEV)
2000	Plymouth	Prowler	—	Rear	—
2000	Plymouth	Prowler	—	Front	—
1999	Chrysler	300M	—	Rear	—
1999	Chrysler	300M	—	Front	—
1999	Chrysler	Cirrus	—	Front	—
1999	Chrysler	Concorde	—	Rear	—
1999	Chrysler	Concorde	—	Front	—
1999	Chrysler	LHS	—	Rear	—
1999	Chrysler	LHS	—	Front	—
1999	Dodge	Dakota	—	Rear	with 12in Pigtail
1999	Dodge	Durango	—	Rear	—
1999	Dodge	Intrepid	—	Rear	—
1999	Dodge	Intrepid	—	Front	—
1999	Dodge	Stratus	—	Front	—
1999	Jeep	Cherokee	—	Rear	—
1999	Jeep	Wrangler	—	Rear	—
1999	Plymouth	Breeze	—	Front	—
1999	Plymouth	Prowler	—	Rear	—
1998	Chrysler	Concorde	—	Rear	—
1998	Chrysler	Concorde	—	Front	—
1998	Chrysler	Sebring	—	Front	—
1998	Chrysler	Town & Country	—	Rear	without Transitional Low Emission Vehicle (TLEV)
1998	Dodge	Caravan	—	Rear	without Transitional Low Emission Vehicle (TLEV)
1998	Dodge	Caravan	—	Rear	—
1998	Dodge	Dakota	—	Rear	with 12in Pigtail
1998	Dodge	Durango	—	Rear	—
1998	Dodge	Grand Caravan	—	Rear	without Transitional Low Emission Vehicle (TLEV)
1998	Dodge	Grand Caravan	—	Rear	—
1998	Dodge	Intrepid	—	Rear	—
1998	Dodge	Intrepid	—	Front	—
1998	Dodge	Stratus	—	Front	—
1998	Jeep	Cherokee	—	Rear	—
1998	Jeep	Grand Cherokee	—	Rear	—
1998	Jeep	Wrangler	—	Rear	—
1998	Plymouth	Breeze	—	Front	—
1998	Plymouth	Grand Voyager	—	Rear	without Transitional Low Emission Vehicle (TLEV)
1998	Plymouth	Grand Voyager	—	Rear	—
1998	Plymouth	Voyager	—	Rear	without Transitional Low Emission Vehicle (TLEV)
1998	Plymouth	Voyager	—	Rear	—
1997	Dodge	B1500	—	Rear	—
1997	Dodge	B2500	—	Rear	—
1997	Dodge	B3500	—	Rear	—
1997	Dodge	Dakota	—	Rear	with 12in Pigtail
1997	Jeep	Cherokee	—	Rear	—
1997	Jeep	Grand Cherokee	—	Rear	—
1997	Jeep	Wrangler	—	Rear	—
1997	Plymouth	Breeze	—	Front	—
1997	Plymouth	Prowler	—	Rear	—
1996	Dodge	B1500	—	Rear	—
1996	Dodge	B2500	—	Rear	—
1996	Dodge	B3500	—	Rear	—
1996	Jeep	Cherokee	—	Rear	—
1996	Jeep	Grand Cherokee	—	Rear	—
No rows match your filter.

Directly replaces or cross-references 93 part numbers

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

BBB Industries — 11144BBB Industries — 11162Bosch — 13138Bosch — 13149Bosch — 13272Bosch — 15218Bosch — 15465DENSO Auto Parts — 234-4008DENSO Auto Parts — 234-4021DENSO Auto Parts — 234-4078Dixie Electric Ltd — 11612Febi-Bilstein — 23014Gates — 23048Gates — 23088Gates — 23098Gates — 23099Gates — 23128Gates — 23133NTK — 23016NTK — 23105Standard Ignition — SG18205S31845S32325S32425S32475S32485S32495S3519138-255138-256138-275138-276138-447138-559138-595250-240784606 133AB4606 133AC4606 133AD4606 133AE4727 2255293 038AB5604 10055604 10065604 10555604 10565604 11085604 1213AB5604 1213AG5604 12195604 4215AA231102311621313192131371213137221313732131374213137521313762131377FE6222FE6232FE6346FE6461FE8825FE80314FE80385OS194OS203OS204OS1019OS1028OS1137OS1481OS2037REA1003SG222SG223SG268SG269SG432SG466SG589SG728SG1815SU3042SU3044SU3051SU3060SU3083SU3174SU3191