Delphi ES10317 Oxygen Sensor - Rear

Delphi ES10317 Rear Oxygen Sensor

The Delphi ES10317 is a non-heated rear oxygen sensor built for emissions monitoring on select Toyota and Geo applications. It uses a 2-wire design with a square connector and 18 x 1.5 mm thread size for direct replacement service on listed California-emissions vehicles.

Key Features

• Non-heated oxygen sensor for rear position applications
• 2-wire configuration with square connector
• 18 x 1.5 mm thread size
• 200.0 overall length
• Includes oxygen sensor and instruction sheet
• OE heritage backed by Delphi’s long supplier experience

Application Details

Compatible with 1993-1995 Geo Prizm, rear, with California Emission System, and 1993-1995 Toyota Corolla, rear, with California Emission System. If you are replacing a rear oxygen sensor on a Toyota Corolla or Geo Prizm from these model years, Delphi ES10317 provides the correct fitment details for the listed emissions configuration. This part cross-references DENSO Auto Parts (e.g., 234-2051) for the same application.

What This Sensor Helps Address

• Check engine light related to rear oxygen sensor performance
• Incorrect exhaust oxygen feedback to the engine control system
• Emissions test failures tied to rear sensor readings
• Rough fuel control caused by a worn or slow-responding sensor

Installation Notes

Verify rear sensor location, connector shape, and thread size before installation. Confirm California Emission System application on the vehicle and compare the original sensor connector and harness routing to the Delphi ES10317. Follow the included instruction sheet and inspect the exhaust bung threads for damage before threading the sensor into place.

Quality Assurance

Delphi draws on more than a century of OE experience and supplier knowledge used by major automakers. That OE background is reflected in the design and application coverage of the ES10317 rear oxygen sensor for listed Toyota Corolla and Geo Prizm vehicles.