Delphi ES10678 Oxygen Sensor - Front

Delphi ES10678 Oxygen Sensor Overview

The Delphi ES10678 is a front oxygen sensor built for specific Mitsubishi Mighty Max and Dodge Ram 50 applications. It uses a non-heated, 2-wire design with a flat connector and 18 x 1.5 mm thread size for direct replacement service.

Built from Delphi’s OE heritage and decades of supplier experience, this oxygen sensor supports accurate exhaust feedback on the listed front-position applications, including Mitsubishi Mighty Max and Dodge Ram 50 models with California and non-California emission system configurations.

Key Features

• Part number: ES10678
• Sensor type: non-heated
• 2-wire construction
• Flat connector shape
• 18 x 1.5 mm thread size
• Overall length: 450.0
• Front position application
• Package contents: oxygen sensor and instruction sheet

Detailed Description

The Delphi ES10678 oxygen sensor is engineered for front exhaust placement on select 1990-1995 Mitsubishi Mighty Max and Dodge Ram 50 trucks. It is listed for 1993-1995 Mitsubishi Mighty Max without California Emission System, 1991-1992 Mitsubishi Mighty Max, 1990 Mitsubishi Mighty Max with California Emission System, 1993 Dodge Ram 50 without California Emission System, 1991-1992 Dodge Ram 50, and 1990 Dodge Ram 50 with California Emission System. If you are replacing a front oxygen sensor on a Mitsubishi Mighty Max or Dodge Ram 50, ES10678 provides the specified connector, thread, and wire configuration for those applications.

This part cross-references DENSO Auto Parts 234-2067 for the same application.

Common Problems This Part Can Address

• Faulty oxygen sensor signal at the front exhaust location
• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn sensor
• Rough idle or drivability issues tied to exhaust sensor input
• Emission test failures caused by a degraded front sensor

Installation Notes and Tips

Confirm the vehicle’s emission system configuration before ordering, since fitment differs between California and non-California applications. Match the connector style, thread size, wire count, and front position to the original sensor before installation. Inspect the harness and exhaust bung threads during replacement to help ensure proper fitment on the Mitsubishi Mighty Max and Dodge Ram 50.

Quality Assurance

Delphi draws on OE supplier experience and original-equipment heritage in the design of its aftermarket parts. That background is reflected in the ES10678 oxygen sensor for the listed Mitsubishi Mighty Max and Dodge Ram 50 applications.