Delphi ES10276 Oxygen Sensor

Delphi ES10276 Oxygen Sensor for Mercedes-Benz

The Delphi ES10276 is a heated upstream oxygen sensor built for precise exhaust monitoring on select Mercedes-Benz applications. It combines OE-based engineering with a 4-wire design, 18 x 1.5 mm thread size, and a 755.0 mm overall length for the listed fitments.

Compatible with 1993 Mercedes-Benz 300CE, 1993 Mercedes-Benz 300E, 1993 Mercedes-Benz 300TE, and 1994 Mercedes-Benz E320, this sensor is a direct-fit option for restoring accurate air-fuel feedback. The ES10276 part number is also referenced by several aftermarket cross numbers for the same application.

Key Features

• Heated oxygen sensor for upstream exhaust placement
• 4-wire configuration for signal and heater circuit operation
• Flat and round connector shape
• 18 x 1.5 mm thread size
• 755.0 mm overall length for the listed Mercedes-Benz applications
• Includes oxygen sensor and instruction sheet
• Delphi ES10276 OE-based aftermarket replacement

Detailed Description

Delphi builds the ES10276 using more than a century of OE experience and supplier knowledge developed with major automakers. That background is reflected in the sensor’s construction and application-specific design, making it a practical replacement for Mercedes-Benz 300CE, 300E, 300TE, and E320 models listed in the fitment data. The heated design helps the sensor reach operating temperature quickly, supporting stable exhaust feedback once the engine is running.

This oxygen sensor is positioned upstream, where it monitors exhaust oxygen content before the catalytic converter. Accurate upstream readings are important for fuel control, drivability, and emissions system performance. If you are searching for a Delphi ES10276 oxygen sensor for Mercedes-Benz 300E or a Delphi ES10276 replacement for 1994 Mercedes-Benz E320, this part matches the specified dimensions and connector style for the listed vehicles.

This part cross-references DENSO Auto Parts 234-4712 and BBB Industries 13314 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate exhaust oxygen readings
• Fuel mixture issues from delayed or inconsistent sensor response
• Emissions test failures tied to upstream sensor faults
• Poor drivability from a worn or aging heated O2 sensor

Installation Notes and Tips

Verify the 755.0 mm overall length, 18 x 1.5 mm thread size, and connector shape before installation. This ES10276 sensor is specified for upstream use on the listed Mercedes-Benz models, so confirm the original sensor location and harness routing before replacement. Follow the included instruction sheet and inspect the connector and exhaust bung threads for damage or contamination during service.

Quality Assurance

Delphi’s OE heritage and supplier experience are built into this aftermarket oxygen sensor, supporting consistent fit and function for the listed applications. The package includes the oxygen sensor and an instruction sheet.