Delphi ES10234 Oxygen Sensor

Delphi ES10234 Oxygen Sensor for BMW Front Applications

The Delphi ES10234 oxygen sensor is a heated front sensor built for select BMW applications from 1985 through 1988. It uses a 3-wire design, round connector shape, and 18 x 1.5 mm thread size for direct-fit replacement in the listed vehicles.

Key Features

• Heated oxygen sensor for faster operating response
• 3-wire configuration
• Round connector shape
• 18 x 1.5 mm thread size
• 540.0 overall length
• Front position application
• Includes oxygen sensor and instruction sheet

Detailed Description

Delphi ES10234 is an emission control oxygen sensor designed for front placement on select BMW models, including the 1985-1987 BMW 325e, 1986-1987 BMW 325es, 1985-1987 BMW 535i, 1985-1987 BMW 635CSi, 1985 BMW 735i, and 1988 BMW M5. Delphi draws on OE heritage and supplier experience with major automakers, and that background is reflected in the aftermarket design of this sensor. This part cross-references Bosch 13049 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Reduced fuel control from an aging front sensor
• Emissions test failures tied to sensor response issues
• Rough idle or drivability concerns caused by inaccurate exhaust feedback

Installation Notes and Tips

Verify the connector shape, wire count, thread size, and front sensor location before installation. Confirm the vehicle application against the listed BMW fitment for the 1985-1988 model years, and inspect the harness routing and exhaust bung condition during replacement. The package includes an instruction sheet for reference.

Quality Assurance

Delphi builds this oxygen sensor using OE experience and knowledge developed through work with leading automakers. That OE-focused background supports consistent fitment and sensor design for the specified BMW front applications.