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Delphi ES20381 Oxygen Sensor - Rear
| Brand | Delphi ES20381 |
|---|---|
| Position | Rear |
| Sensor Type | Heated |
| Wire Quantity | 4 |
| Connector Shape | Square |
| Thread Size | 18 x 1.5 mm |
| Overall Length | 255.0 |
| Package Contents | Oxygen sensor, instruction sheet |
| Fits | Acura and Honda · 11 vehicles |
Heated sensor. Delivers faster operation for more consistent emissions monitoring.
Square connector. Simplifies hookup with a straightforward, secure connection.
OE heritage. Built on a century of original-equipment experience.
Cross-references Bosch 18100, DENSO Auto Parts 234-4462 and Gates 24434 for the same application. See all 7.
Delphi ES20381 Rear Oxygen Sensor
Delphi ES20381 is a heated rear oxygen sensor built for precise exhaust monitoring on select Acura and Honda applications. It uses OE-based engineering from a supplier with long-standing original equipment experience, helping maintain accurate feedback for emissions system performance.
Key Features
- Heated oxygen sensor for faster operating temperature
- 4-wire design with square connector shape
- 18 x 1.5 mm thread size for direct-fit installation
- 255.0 overall length
- Rear position sensor
- Includes oxygen sensor and instruction sheet
Detailed Description
This Delphi ES20381 oxygen sensor is specified for rear exhaust placement on 2009-2014 Acura TSX and 2008-2012 Honda Accord applications. As a heated sensor, it helps the engine management system monitor exhaust oxygen content after the catalytic converter, supporting proper fuel control and emissions diagnostics. Delphi’s OE heritage is built into the part design, reflecting the company’s experience supplying original equipment to major automakers.
The ES20381 features a square connector, 4-wire configuration, and 18 x 1.5 mm thread size for a direct replacement style fit. If you are searching for a rear oxygen sensor for 2009-2014 Acura TSX or a rear oxygen sensor for 2008-2012 Honda Accord, Delphi ES20381 is the listed application. This part cross-references Bosch 18100 for the same application.
What It Helps Address
- Check engine light related to rear oxygen sensor faults
- Incorrect oxygen sensor signal after the catalytic converter
- Emissions test failures tied to sensor performance
- Rough fuel trim correction caused by inaccurate exhaust feedback
- Diagnostic trouble codes associated with rear O2 sensor operation
Installation Notes and Tips
Verify rear sensor placement before installation and confirm connector shape, wire count, and thread size match the original unit. Inspect the exhaust bung threads and wiring routing before tightening the sensor. For best results, compare the removed sensor to Delphi ES20381 before installation on Acura TSX or Honda Accord applications.
Quality Assurance
Delphi builds this sensor using OE-focused engineering informed by decades of original equipment supply experience. That background supports consistent fitment and sensor construction for emissions control service on the listed vehicles.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2014 | Acura | TSX | Rear | — |
| 2013 | Acura | TSX | Rear | — |
| 2012 | Acura | TSX | Rear | — |
| 2012 | Honda | Accord | Rear | — |
| 2011 | Acura | TSX | Rear | — |
| 2011 | Honda | Accord | Rear | — |
| 2010 | Acura | TSX | Rear | — |
| 2010 | Honda | Accord | Rear | — |
| 2009 | Acura | TSX | Rear | — |
| 2009 | Honda | Accord | Rear | — |
| 2008 | Honda | Accord | Rear | — |
| No rows match your filter. | ||||