Delphi ES20389 Oxygen Sensor - Front
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Delphi

Delphi ES20389 Oxygen Sensor - Front

Brand Delphi ES20389
Position Front
Sensor Type Heated
Wire Quantity 4
Connector Shape Square
Thread Size 18 x 1.5 mm
Overall Length 490.0
Package Contents Oxygen sensor, instruction sheet
Fits Mazda · 2 vehicles

Heated sensor. Provides faster operation for responsive emissions monitoring.

Square connector. Simplifies hookup with a straightforward, secure connection.

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

Cross-references BBB Industries 13769, DENSO Auto Parts 234-4396 and Four Seasons 24234 for the same application. See all 8.

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Front Oxygen Sensor for Mazda 5

Delphi ES20389 is a heated front oxygen sensor built for 2006-2007 Mazda 5 applications. It uses a 4-wire design, square connector shape, and 18 x 1.5 mm thread size to match the specified OE-style fitment.

  • Heated oxygen sensor for front placement
  • 4-wire configuration for signal and heater circuit operation
  • Square connector shape for direct-style electrical connection
  • 18 x 1.5 mm thread size
  • Overall length: 490.0
  • Package contents: oxygen sensor and instruction sheet

OE-Style Emissions Monitoring

Delphi ES20389 is an emission control sensor used to monitor exhaust oxygen content and support engine management on the Mazda 5. Delphi draws on more than a century of OE experience and supplier knowledge, which is reflected in the sensor’s application-specific design and construction. This part cross-references DENSO Auto Parts 234-4396 and BBB Industries 13769 for the same application.

Used For

  • Replacing a failed front oxygen sensor on a 2006-2007 Mazda 5
  • Correcting oxygen sensor fault codes related to the front sensor circuit
  • Restoring proper exhaust feedback to the engine control system
  • Addressing poor fuel control caused by inaccurate upstream sensor readings
  • Resolving emissions inspection failures tied to front sensor performance

Installation Notes

Verify the connector shape, wire count, thread size, and front position before installation. Compare the original sensor length and connector routing to confirm proper fit on the Mazda 5. Follow the included instruction sheet and use the vehicle service procedure for sensor removal, thread preparation, and torque specification.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and application knowledge developed through long-term supplier experience with major automakers. ES20389 is engineered to meet the fitment and functional requirements of the listed Mazda 5 front oxygen sensor application.

Related reading

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2007Mazda5Front—
2006Mazda5Front—
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 13769DENSO Auto Parts — 234-4396Four Seasons — 242345S830925024660LF66-18-861C9USG1662SU9774