Delphi ES10246 Oxygen Sensor

Delphi ES10246 Oxygen Sensor Overview

The Delphi ES10246 is a heated upstream oxygen sensor built for precise exhaust monitoring and reliable engine management feedback. It is a direct-fit replacement for select BMW applications, including 1987-1988 BMW 325is and 1988 BMW 325i, 325iX, and 528e models.

With OE-based engineering informed by Delphi’s long history supplying automakers, this oxygen sensor is built to match the original application requirements for fit, connector style, and thread specification.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire design for the specified vehicle application
• Round connector shape for OE-style electrical connection
• 18 x 1.5 mm thread size for direct installation in the exhaust bung
• 520.0 overall length for proper routing and reach
• Upstream position for pre-catalyst exhaust gas monitoring
• Includes oxygen sensor and instruction sheet

Detailed Description

Delphi ES10246 is an upstream heated oxygen sensor engineered for BMW 325i, BMW 325is, BMW 325iX, and BMW 528e fitments listed for 1987-1988. As an upstream sensor, it measures exhaust oxygen content before the catalytic converter so the engine control system can adjust air-fuel delivery. That makes the Delphi ES10246 a key replacement when restoring drivability and emissions system performance on these BMW applications.

This part cross-references Bosch 13038 for the same application. If you are searching for a BMW oxygen sensor replacement by part number, ES10246 is also referenced in aftermarket listings under Delphi ES10246.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate exhaust feedback
• Fuel mixture issues from a slow or failing upstream sensor
• Emissions test failures tied to sensor response problems
• Poor fuel economy from incorrect air-fuel control

Installation Notes and Tips

Verify the connector shape, wire count, thread size, and upstream position before installation. For the listed BMW 325i, 325is, 325iX, and 528e applications, confirm the vehicle build date and sensor location match the fitment notes, including 1988 models noted as to 09/1987 where applicable. Inspect the exhaust bung threads and wiring routing before tightening the sensor into place.

Quality Assurance

Delphi builds this oxygen sensor using OE heritage and application knowledge developed through long-term supplier experience with major automakers. That OE-based approach supports consistent fitment and dependable sensor construction for the specified BMW applications.