Delphi ES10857 Oxygen Sensor - Rear
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Delphi

Delphi ES10857 Oxygen Sensor - Rear

Brand Delphi ES10857
Position Rear
Connector Shape Round
Overall Length 990.0
Package Contents Oxygen Sensor, Instruction Sheet
Sensor Type Heated
Thread Size 18 x 1.5 mm
Wire Quantity 4
Fits BMW and Land Rover · 71 vehicles

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

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

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

Cross-references Bosch 15109, Bosch 15669 and DENSO Auto Parts 234-4682 for the same application. See all 24.

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Rear Oxygen Sensor for BMW and Land Rover

Delphi ES10857 is a heated rear oxygen sensor built for precise exhaust monitoring on select BMW and Land Rover applications. It uses OE-based engineering from Delphiโ€™s long history supplying original equipment to major automakers, helping maintain accurate feedback for the engine management system.

  • Heated oxygen sensor for rear position applications
  • 4-wire design with round connector shape
  • 18 x 1.5 mm thread size
  • Overall length: 990.0
  • Package contents: oxygen sensor and instruction sheet
  • Delphi ES10857 replacement part for select BMW X3, X5, 325i, 330i, Z4, and Range Rover applications

Fitment and Application Details

Compatible with rear sensor locations on a wide range of BMW and Land Rover models, including Fits 2004-2006 BMW X3, Rear; Fits 2000-2006 BMW X5, Rear; Fits 2001-2005 BMW 325xi, Rear; Fits 2001-2005 BMW 330xi, Rear; Fits 2003-2005 BMW Z4, Rear; and Fits 2003-2005 Land Rover Range Rover, Rear. Additional coverage includes BMW 325Ci, 325i, 330Ci, 330i, 525i, 530i, Z3, 750iL, 323Ci, 323i, 328Ci, 328i, 528i, 318ti, 318i, and 318is rear applications across the listed model years.

This part cross-references Bosch 15109 and DENSO Auto Parts 234-4682 for the same application.

What This Sensor Helps Address

  • Check engine light related to rear oxygen sensor performance
  • Incorrect exhaust oxygen feedback to the engine control module
  • Emissions test failures caused by a worn sensor
  • Rough idle or drivability issues tied to inaccurate air-fuel monitoring
  • Slow sensor response from age, heat cycling, or contamination

Installation Notes and Tips

Install the sensor in the rear position specified by the vehicle application and verify the 18 x 1.5 mm thread size before installation. The round connector and 4-wire heated design should be matched to the original connector style and harness routing. Review the included instruction sheet and confirm the sensor location on BMW X3, BMW X5, BMW 325i, BMW 330i, and Land Rover Range Rover applications before final tightening.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and engineering knowledge developed through decades of original equipment supply. ES10857 reflects that background with application-specific fitment and sensor construction for rear exhaust monitoring.

Related reading

This part fits 71 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypeTransmissionPositionNotes
2006BMWX3—ManualRearLocated on Manifold
2006BMWX5——Rear—
2005BMW325xi——Rear—
2005BMW330xi——Rear—
2005BMWX3—ManualRearLocated on Manifold
2005BMWX3——RearLocated on Manifold
2005BMWX5——Rear—
2005BMWZ4——RearCylinders 1 through 6
2005Land RoverRange Rover——Rear—
2004BMW325xi——Rear—
2004BMW330xi——Rear—
2004BMWX3—ManualRearLocated on Manifold
2004BMWX3——RearLocated on Manifold
2004BMWX5——Rear—
2004BMWZ4——RearCylinders 1 through 6
2004Land RoverRange Rover——Rear—
2003BMW325Ci——RearTo 03/2003
2003BMW325i——RearTo 03/2003
2003BMW325xi——Rear—
2003BMW330Ci——RearTo 03/2003
2003BMW330i——RearTo 03/2003
2003BMW330xi——Rear—
2003BMW525i——Rear—
2003BMW530i——Rear—
2003BMWX5——Rear—
2003BMWZ4——RearCylinders 1 through 6
2003Land RoverRange Rover——Rear—
2002BMW325Ci——Rear—
2002BMW325i——Rear—
2002BMW325xi——Rear—
2002BMW330Ci——Rear—
2002BMW330i——Rear—
2002BMW330xi——Rear—
2002BMW525i——Rear—
2002BMW530i——Rear—
2002BMWX5——Rear—
2002BMWZ3——Rear—
2001BMW325Ci——Rear—
2001BMW325i——Rear—
2001BMW325xi——Rear—
2001BMW330Ci——Rear—
2001BMW330i——Rear—
2001BMW330xi——Rear—
2001BMW525i——Rear—
2001BMW530i——Rear—
2001BMW750iL——Rear—
2001BMWX5——Rear—
2001BMWZ3——Rear—
2000BMW323Ci——Rear—
2000BMW323i——Rear—
2000BMW328Ci——Rear—
2000BMW328i——Rear—
2000BMW528i——Rear—
2000BMW750iL——Rear—
2000BMWX5——Rear—
2000BMWZ3——Rear—
1999BMW318ti——Rear—
1999BMW323iSedan—Rear—
1999BMW328iSedan—Rear—
1999BMW528i——Rear—
1999BMW750iL——Rear—
1999BMWZ3——Rear—
1998BMW318i——Rear—
1998BMW318ti——Rear—
1998BMW750iL——Rear—
1997BMW318i——Rear—
1997BMW318is——Rear—
1997BMW318ti——Rear—
1996BMW318i——Rear—
1996BMW318is——Rear—
1996BMW318ti——Rear—
Directly replaces or cross-references 24 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 15109Bosch — 15669DENSO Auto Parts — 234-4682DENSO Auto Parts — 234-4683Walker Products — 250-2439211 78 1 341 02211 78 1 433 94011 78 1 739 84511 78 7 513 963156-4193255872131472MHK 000220OS1653OS2351REA1154REA1562SG899SG1108SG1193SG1518SU5736SU6953SU6969