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Delphi ES20370 Oxygen Sensor - Rear Right
| Brand | Delphi ES20370 |
|---|---|
| Position | Rear Right |
| Connector Shape | Square |
| Overall Length | 1035.0 |
| Package Contents | Oxygen Sensor, Instruction Sheet |
| Sensor Type | Heated |
| Thread Size | 18 x 1.5 mm |
| Wire Quantity | 4 |
| Fits | INFINITI and Nissan · 5 vehicles |
Heated sensor. Built for faster operation and stable readings.
Square connector. Simplifies a clean, secure electrical connection.
OE heritage. Backed by Delphi's century of original-equipment experience.
Cross-references Bosch 15225, DENSO Auto Parts 234-4270 and Gates 24634 for the same application. See all 10.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Delphi ES20370 Oxygen Sensor for Rear Right Fitment
Delphi ES20370 is a heated oxygen sensor built for rear right exhaust monitoring on select Nissan and INFINITI applications. It combines OE-based engineering with the sensor specifications needed for accurate emissions feedback on the 2002-2004 INFINITI I35 and 2002-2003 Nissan Maxima.
Key Features
- Heated oxygen sensor for rear right position
- 4-wire design for signal and heater circuit operation
- Square connector shape for direct-style electrical connection
- 18 x 1.5 mm thread size
- Overall length: 1035.0
- Includes oxygen sensor and instruction sheet
- OE heritage backed by Delphi’s long history supplying top automakers
Product Details
The Delphi ES20370 oxygen sensor is engineered for rear right exhaust placement and is specified for vehicles that rely on precise exhaust-gas feedback to manage emissions performance. Delphi draws on more than a century of OE experience, and that background is reflected in the sensor design, connector style, thread specification, and heated operation. For shoppers searching for a rear right oxygen sensor for 2002-2004 INFINITI I35 or 2002-2003 Nissan Maxima, ES20370 is a direct application-focused option. This part cross-references Bosch 15225 and DENSO Auto Parts 234-4270 for the same application.
What It Helps Address
- Check engine light related to rear oxygen sensor faults
- Incorrect exhaust oxygen readings at the rear right position
- Heater circuit-related sensor codes
- Emissions test failures tied to sensor performance
- Rough fuel control caused by inaccurate exhaust feedback
Installation Notes
Verify rear right placement before installation and confirm the connector shape, thread size, and wire count match the original sensor. Inspect the exhaust bung threads and wiring routing before tightening the sensor to specification. For fitment-based searches, this part fits 2002-2004 INFINITI I35, rear right, and fits 2002-2003 Nissan Maxima, rear right. The Delphi ES20370 part number should be matched to the vehicle’s original sensor location and connector layout before replacement.
Quality Assurance
Delphi builds this sensor using OE-focused engineering informed by its supplier experience with major automakers. That OE heritage supports consistent fit, electrical connection, and emissions-system performance for the listed applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004 | INFINITI | I35 | Rear Right | — |
| 2003 | INFINITI | I35 | Rear Right | — |
| 2003 | Nissan | Maxima | Rear Right | — |
| 2002 | INFINITI | I35 | Rear Right | — |
| 2002 | Nissan | Maxima | Rear Right | — |
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