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Delphi ES10949 Oxygen Sensor
| Brand | Delphi ES10949 |
|---|---|
| Connector Shape | Square |
| Overall Length | 555.0 |
| Package Contents | Oxygen Sensor, Instruction Sheet |
| Position(s) | Front |
| Sensor Type | Non Heated |
| Thread Size | 18 x 1.5 mm |
| Wire Quantity | 1 |
| Fits | Mazda and Ford · 14 vehicles |
OE heritage. Built with a century of original-equipment experience.
Non-heated sensor. Simple design with a single wire and square connector.
Oxygen sensor. Monitors exhaust gases as part of the emission control system.
Cross-references DENSO Auto Parts 234-1020, Four Seasons 24010 and Four Seasons 24019 for the same application. See all 45.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Delphi ES10949 Oxygen Sensor Overview
The Delphi ES10949 is a front oxygen sensor built for emission control service on select Ford and Mazda applications. It uses a non-heated, single-wire design with a square connector and 18 x 1.5 mm thread size for direct-fit replacement where specified.
Delphi draws on OE heritage and supplier experience to build aftermarket parts with the same application knowledge used by major automakers. This oxygen sensor is a practical choice for restoring accurate exhaust feedback on vehicles such as the Mazda MX-6, Mazda RX-7, Ford Probe, and Mazda 626.
Key Features
- Brand: Delphi
- Part number: ES10949
- Part type: Oxygen Sensor
- Sensor type: Non Heated
- Wire quantity: 1
- Connector shape: Square
- Thread size: 18 x 1.5 mm
- Overall length: 555.0
- Position: Front
- Package contents: Oxygen sensor and instruction sheet
Detailed Description
The Delphi ES10949 oxygen sensor is engineered for front-position exhaust monitoring on 1990-1996 Ford and Mazda vehicles listed in the fitment data. It is a non-heated sensor with a single-wire layout, making it a straightforward replacement where the original application calls for this configuration. If you are servicing a Mazda MX-6, Mazda RX-7, Ford Probe, or Mazda 626, this part number ES10949 matches the specified OE-style fitment requirements.
This part cross-references DENSO Auto Parts 234-1020 for the same application.
Common Issues This Part Can Address
- Faulty oxygen sensor signal affecting fuel control
- Check engine light related to exhaust oxygen monitoring
- Rough idle or drivability concerns tied to sensor aging
- Failed emissions inspection caused by inaccurate exhaust feedback
- Slow sensor response from a worn front O2 sensor
Installation Notes and Tips
- Confirm the vehicle uses a front, non-heated oxygen sensor before ordering.
- Verify the connector shape and 18 x 1.5 mm thread size against the original part.
- Inspect the exhaust bung threads and clean them before installation.
- Route the lead away from hot exhaust components and moving parts.
- Use the vehicle service information for proper torque and connector routing.
Quality Assurance
Delphi builds this oxygen sensor using OE experience and application knowledge developed through years of supplying major automakers. The ES10949 is backed by Delphi’s aftermarket engineering approach and includes an instruction sheet for installation reference.
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 1996 | Mazda | MX-6 | M Edition | N/A | — |
| 1996 | Mazda | MX-6 | — | N/A | — |
| 1995 | Mazda | RX-7 | — | N/A | — |
| 1994 | Mazda | RX-7 | — | N/A | — |
| 1993 | Mazda | RX-7 | — | N/A | — |
| 1992 | Ford | Probe | — | N/A | — |
| 1992 | Mazda | 626 | — | N/A | — |
| 1992 | Mazda | MX-6 | — | N/A | — |
| 1991 | Ford | Probe | — | N/A | — |
| 1991 | Mazda | 626 | — | N/A | — |
| 1991 | Mazda | MX-6 | — | N/A | — |
| 1990 | Ford | Probe | — | N/A | — |
| 1990 | Mazda | 626 | — | N/A | — |
| 1990 | Mazda | MX-6 | — | N/A | — |
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