Delphi ES10743 Oxygen Sensor - Rear
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Delphi

Delphi ES10743 Oxygen Sensor - Rear

Brand Delphi ES10743
Position Rear
Connector Shape Square
Overall Length 535.0
Package Contents Oxygen Sensor, Instruction Sheet
Sensor Type Heated
Thread Size 18 x 1.5 mm
Wire Quantity 4
Fits Kia · 7 vehicles

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

Square connector. Designed for a secure, straightforward electrical connection.

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

Cross-references Bosch 13404, Bosch 15076 and DENSO Auto Parts 234-4687 for the same application. See all 11.

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Rear Heated Oxygen Sensor for Kia Spectra and Sephia

Delphi ES10743 is a rear heated oxygen sensor built for specific Kia applications, including the 1998-2001 Kia Sephia and 2000-2001 Kia Spectra, plus the 2002 Kia Spectra built through 05/22/2001. It uses OE-based engineering from Delphi’s long history supplying original equipment to major automakers.

  • Heated oxygen sensor for rear position monitoring
  • 4-wire design with square connector shape
  • 18 x 1.5 mm thread size for the specified exhaust bung
  • Includes oxygen sensor and instruction sheet
  • Direct fit for rear sensor service on Kia Sephia and Kia Spectra applications

OE-Style Construction

Delphi ES10743 is engineered around the specifications needed for rear exhaust feedback on the listed Kia models. The heated design helps the sensor reach operating temperature quickly, while the 4-wire configuration and square connector support proper electrical connection in the vehicle harness. This part number, ES10743, is a practical replacement choice when servicing a rear oxygen sensor on a Kia Sephia or Kia Spectra.

This part cross-references Bosch (e.g., 13404, 15076) for the same application.

What It Helps Address

  • Check engine light related to rear oxygen sensor performance
  • Fault codes tied to exhaust oxygen monitoring
  • Rough or inconsistent fuel control caused by a failing sensor signal
  • Slow sensor response from an aging heated O2 sensor
  • Emissions inspection failures linked to rear sensor issues

Installation Notes

Verify rear sensor placement before installation and confirm the thread size matches the exhaust bung. Compare the connector shape and wire count to the original sensor before connecting. For fitment, this part fits 1998-2001 Kia Sephia, rear; 2000-2001 Kia Spectra, rear; and 2002 Kia Spectra, rear, to 05/22/2001.

Quality Assurance

Delphi draws on more than a century of OE experience and original-equipment supply knowledge, and that engineering background is reflected in ES10743. The part is built to the listed OE-style specifications for the confirmed Kia applications.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2002KiaSpectraRearTo 05/22/2001
2001KiaSephiaRear—
2001KiaSpectraRear—
2000KiaSephiaRear—
2000KiaSpectraRear—
1999KiaSephiaRear—
1998KiaSephiaRear—
Directly replaces or cross-references 11 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 13404Bosch — 15076DENSO Auto Parts — 234-4687Gates — 246000K2A5-18-8610K2AB-18-861138-772156-411725024388OS1194SU5276