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Delphi ES10254 Oxygen Sensor
| Brand | Delphi ES10254 |
|---|---|
| Sensor Type | Heated |
| Wire Quantity | 4 |
| Connector Shape | Round |
| Thread Size | 18 x 1.5 mm |
| Overall Length | 630.0 |
| Package Contents | Oxygen sensor, instruction sheet |
| Position(s) | Upstream |
| Fits | BMW · 15 vehicles |
Heated sensor. Delivers faster operation for more responsive emissions monitoring.
Round connector. Simplifies hookup with a clean, secure electrical connection.
OE heritage. Built with 100 years of OE experience and supplier knowledge.
Cross-references Bosch 13231, DENSO Auto Parts 234-4674 and DENSO Auto Parts 234-4676 for the same application. See all 43.
Delphi ES10254 Oxygen Sensor Overview
The Delphi ES10254 is a heated upstream oxygen sensor built for precise exhaust feedback and OE-style fitment. Backed by Delphi’s century of original equipment experience, it brings factory-informed engineering to BMW 325i, 325is, 325iX, and 850CSi applications.
With a 4-wire heated design, round connector, and 18 x 1.5 mm thread size, this oxygen sensor is specified for direct replacement use on listed BMW applications. The Delphi ES10254 is also a cross-reference for Bosch 13231 and DENSO Auto Parts 234-4674 / 234-4676 applications.
Key Features
- Heated oxygen sensor for upstream exhaust monitoring
- 4-wire configuration for signal and heater circuit operation
- Round connector shape for listed vehicle applications
- 18 x 1.5 mm thread size
- Overall length: 630.0
- Package contents: oxygen sensor and instruction sheet
- Delphi part number ES10254
Detailed Description
Delphi ES10254 is an upstream oxygen sensor engineered for BMW 325i, 325is, 325iX, and 850CSi fitments listed below. It uses a heated sensing element to help the engine control system monitor exhaust oxygen content more quickly after startup and during normal operation. Delphi’s OE background is reflected in the sensor’s application-specific design and construction.
Fits 1994-1995 BMW 850CSi, N/A. Fits 1987-1991 BMW 325i, N/A. Fits 1988-1991 BMW 325is, N/A. Fits 1988-1991 BMW 325iX, N/A. This part number, ES10254, is a direct-fit option for these BMW applications when the connector, thread, and sensor configuration match the vehicle.
What It Helps Address
- Check engine light related to oxygen sensor performance
- Incorrect air-fuel ratio readings
- Slow sensor response during warm-up
- Rough idle or drivability issues tied to exhaust feedback
- Failed emissions inspection caused by a worn upstream sensor
Installation Notes and Tips
Verify the connector shape, wire count, thread size, and upstream position before installation. Compare the removed sensor to the Delphi ES10254 to confirm the same application, especially on BMW 325i and 325is models with production-date notes. Use proper oxygen sensor service tools and follow the vehicle service procedure for removal and installation.
Quality Assurance
Delphi builds this sensor using OE experience gained from supplying major automakers, with aftermarket engineering informed by original equipment knowledge. The ES10254 is intended to meet the fitment and functional requirements of the listed BMW applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1995 | BMW | 850CSi | N/A | — |
| 1994 | BMW | 850CSi | N/A | — |
| 1991 | BMW | 325i | N/A | — |
| 1991 | BMW | 325is | N/A | — |
| 1991 | BMW | 325iX | N/A | — |
| 1990 | BMW | 325i | N/A | — |
| 1990 | BMW | 325is | N/A | — |
| 1990 | BMW | 325iX | N/A | — |
| 1989 | BMW | 325i | N/A | — |
| 1989 | BMW | 325is | N/A | — |
| 1989 | BMW | 325iX | N/A | — |
| 1988 | BMW | 325i | N/A | From 09/1987 |
| 1988 | BMW | 325is | N/A | From 09/1987 |
| 1988 | BMW | 325iX | N/A | From 09/1987 |
| 1987 | BMW | 325i | N/A | — |
| No rows match your filter. | ||||