Delphi ES10323 Oxygen Sensor - Front or Rear

Delphi ES10323 Oxygen Sensor Overview

The Delphi ES10323 oxygen sensor is a direct-fit emission control replacement built around OE experience and application-specific engineering. It uses a non-heated, 2-wire design with a square connector and 18 x 1.5 mm thread size for select Toyota and Geo applications.

Compatible with front and rear sensor locations on listed vehicles, this Delphi ES10323 oxygen sensor supports accurate exhaust feedback for 1992-1997 Toyota and Geo models, including Toyota Corolla, Toyota MR2, Toyota Celica, and Geo Prizm.

Key Features

• Brand: Delphi
• Part number: ES10323
• Sensor type: Non Heated
• Wire quantity: 2
• Connector shape: Square
• Thread size: 18 x 1.5 mm
• Overall length: 480.0 mm
• Package contents: Oxygen sensor and instruction sheet
• Position coverage: Front and rear, depending on vehicle application

Detailed Product Description

Delphi builds this oxygen sensor using OE heritage and decades of supplier experience with major automakers. The ES10323 is specified for vehicles that require a 480 mm overall length and a non-heated, two-wire sensor layout. For fitment-specific placement, refer to the application details for your Toyota Corolla, Toyota MR2, Toyota Celica, or Geo Prizm.

This part cross-references Bosch 12108 for the same application. It is also listed with interchange references including DENSO Auto Parts 234-2003 and 234-2008.

What This Oxygen Sensor Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect exhaust oxygen feedback to the engine control system
• Rough idle or drivability issues tied to aging sensor response
• Emissions test failures caused by a worn sensor
• Fuel control problems from inaccurate air-fuel ratio readings

Installation Notes and Fitment

• Fits 1995-1997 Geo Prizm, front, with 480mm overall length.
• Fits 1995-1997 Toyota Corolla, front, with 480mm overall length.
• Fits 1993-1995 Toyota MR2, rear, with 480mm overall length.
• Fits 1992-1993 Toyota Celica, rear, with 480mm overall length; with California Emission System.
• Fits 1992 Toyota MR2, rear, with 480mm overall length; from 01/1992.

Confirm the sensor position, connector style, thread size, and overall length before installation. This Delphi ES10323 oxygen sensor is listed for both front and rear positions, but the correct location depends on the exact vehicle application.

Quality Assurance

Delphi draws on more than 100 years of OE experience, with engineering knowledge carried into its aftermarket emission control parts. That OE background supports consistent fitment and application-specific replacement for listed Toyota and Geo vehicles.