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Delphi ES20056 Oxygen Sensor - Rear, Rear Left or Rear Right
| Brand | Delphi ES20056 |
|---|---|
| Position | Rear Right |
| Connector Shape | Square |
| Overall Length | 910.0 |
| Package Contents | Oxygen Sensor, Instruction Sheet |
| Position(s) | Rear, Rear Left, Rear Right. 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 | Nissan and INFINITI · 22 vehicles |
Heated sensor. Delivers faster operation for more responsive emissions monitoring.
Square connector. Provides a straightforward electrical connection for installation.
OE heritage. Built with 100 years of OE experience and supplier knowledge.
Cross-references BBB Industries 13226, Bosch 13264 and Bosch 15959 for the same application. See all 42.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Delphi ES20056 Oxygen Sensor Overview
The Delphi ES20056 is a heated oxygen sensor built for rear sensor locations on select Nissan and INFINITI applications. It combines OE-based engineering with a 4-wire design, square connector, and 18 x 1.5 mm thread size for direct-fit replacement needs.
Compatible With rear oxygen sensor service on 1996-2000 Nissan Pathfinder, 1997-2000 INFINITI QX4, 1999-2000 Nissan Frontier, 2000-2003 Nissan Xterra, and select 2001-2003 Nissan Frontier rear positions.
- Heated oxygen sensor for faster operating response
- 4-wire configuration
- Square connector shape
- 18 x 1.5 mm thread size
- Overall length: 910.0
- Includes oxygen sensor and instruction sheet
- Rear, rear left, and rear right applications depending on vehicle
OE-Based Design and Fitment
Delphi ES20056 is engineered from more than a century of OE experience and supplier knowledge used by major automakers. That background is reflected in the sensor’s construction and application coverage for Nissan Frontier, Nissan Xterra, Nissan Pathfinder, and INFINITI QX4 rear sensor positions. This part cross-references Bosch 13264 and DENSO Auto Parts 234-4703 for the same application. The Delphi ES20056 is a practical replacement choice when servicing rear oxygen sensor circuits that require the listed connector, thread, and wire configuration.
What This Sensor Helps Address
- Check engine light related to rear oxygen sensor performance
- Fault codes tied to slow sensor response
- Incorrect exhaust oxygen readings from a worn sensor
- Emissions inspection failures caused by sensor degradation
- Rough fuel control caused by inaccurate exhaust feedback
Installation Notes and Tips
Verify the exact position on your vehicle before ordering, since this part is listed for rear, rear left, and rear right locations depending on application. Confirm connector shape, wire count, and thread size against the original sensor before installation. Use the vehicle application tab to match the correct side for your Nissan Frontier, Nissan Xterra, Nissan Pathfinder, or INFINITI QX4.
Quality Assurance
Delphi builds aftermarket parts using OE heritage and application knowledge developed through long-term supplier experience with leading automakers. That OE-based approach supports consistent fitment and sensor construction for the ES20056 replacement oxygen sensor.
| Year | Make | Model | Submodel | Transmission | Position | Notes |
|---|---|---|---|---|---|---|
| 2003 | Nissan | Frontier | — | — | Rear Right | — |
| 2003 | Nissan | Frontier | XE | — | Rear Right | — |
| 2003 | Nissan | Xterra | — | — | Rear Right | — |
| 2002 | Nissan | Frontier | — | — | Rear Right | — |
| 2002 | Nissan | Frontier | — | — | Rear Left | — |
| 2002 | Nissan | Frontier | XE | — | Rear Right | — |
| 2002 | Nissan | Frontier | XE | — | Rear Left | — |
| 2002 | Nissan | Xterra | — | — | Rear Right | — |
| 2001 | Nissan | Frontier | — | — | Rear | — |
| 2001 | Nissan | Xterra | — | — | Rear Right | — |
| 2000 | INFINITI | QX4 | — | — | Rear Right | — |
| 2000 | Nissan | Frontier | — | Automatic | Rear Right | — |
| 2000 | Nissan | Pathfinder | — | — | Rear Right | — |
| 2000 | Nissan | Xterra | — | — | Rear Right | — |
| 1999 | INFINITI | QX4 | — | — | Rear Right | — |
| 1999 | Nissan | Frontier | — | — | Rear Right | — |
| 1999 | Nissan | Pathfinder | — | — | Rear Right | — |
| 1998 | INFINITI | QX4 | — | — | Rear Right | — |
| 1998 | Nissan | Pathfinder | — | — | Rear Right | — |
| 1997 | INFINITI | QX4 | — | — | Rear Right | — |
| 1997 | Nissan | Pathfinder | — | — | Rear Right | — |
| 1996 | Nissan | Pathfinder | — | — | Rear Right | — |
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