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Delphi ES10903 Oxygen Sensor - Front or Rear
| Brand | Delphi ES10903 |
|---|---|
| Position | Rear and Front |
| Sensor Type | Heated |
| Wire Quantity | 4 |
| Connector Shape | Square |
| Thread Size | 18 x 1.5 mm |
| Overall Length | 1020.0 |
| Package Contents | Oxygen sensor, instruction sheet |
| Position(s) | Front, rear. for the position specific to your vehicle, refer to |
| Fits | Mazda · 8 vehicles |
Heated sensor. Helps the oxygen sensor reach operating temperature quickly.
Square connector. Designed with a 4-wire setup for straightforward replacement.
OE heritage. Built from 100 years of OE experience and supplier knowledge.
Cross-references BBB Industries 13866, BBB Industries 13962 and DENSO Auto Parts 234-4147 for the same application. See all 18.
Delphi ES10903 Oxygen Sensor Overview
The Delphi ES10903 is a heated oxygen sensor built for precise exhaust monitoring and reliable engine management feedback. It draws on Delphi’s OE heritage and is a direct-fit option for select Mazda applications, including Mazda Miata rear and Mazda MPV front positions.
Compatible With 2001-2005 Mazda Miata, rear, and 1996-1998 Mazda MPV, front. The Delphi ES10903 is engineered for vehicles that need accurate air-fuel ratio data to support emissions control and drivability.
Key Features
- Heated oxygen sensor design for faster operating temperature
- 4-wire configuration for signal and heater circuit operation
- Square connector shape for application-specific fitment
- 18 x 1.5 mm thread size
- Overall length: 1020.0
- Includes oxygen sensor and instruction sheet
- Position-specific fitment for front or rear applications
Detailed Description
Delphi ES10903 is an emission control sensor designed to monitor exhaust oxygen content and send data to the engine control system. With heated operation, it reaches working temperature more quickly, helping maintain stable sensor feedback during cold starts and normal driving. This part cross-references DENSO Auto Parts (e.g., 234-4147, 234-4330) for the same application. For Mazda Miata and Mazda MPV service, the ES10903 supports accurate fuel control and emissions system performance where the original sensor has aged or failed.
Common Issues This Sensor Can Address
- Check engine light related to oxygen sensor performance
- Rough idle caused by incorrect exhaust feedback
- Reduced fuel economy from inaccurate air-fuel mixture control
- Failed emissions inspection due to sensor deterioration
- Slow sensor response after cold start
Installation Notes and Tips
Verify the vehicle position before ordering, since this part is listed for front and rear locations depending on application. Confirm the connector shape, wire count, and thread size against the original sensor before installation. Use the application tab to match the correct position for your Mazda Miata or Mazda MPV, and inspect the harness routing to ensure the 1020.0 overall length is appropriate for the vehicle.
Quality Assurance
Delphi builds aftermarket parts using OE experience and engineering knowledge developed through long-term supplier relationships with major automakers. The ES10903 reflects that OE-focused approach for emission control service on select Mazda applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Mazda | Miata | Rear | — |
| 2004 | Mazda | Miata | Rear | — |
| 2003 | Mazda | Miata | Rear | — |
| 2002 | Mazda | Miata | Rear | — |
| 2001 | Mazda | Miata | Rear | — |
| 1998 | Mazda | MPV | Front | — |
| 1997 | Mazda | MPV | Front | — |
| 1996 | Mazda | MPV | Front | — |
| No rows match your filter. | ||||