Delphi ES10146 Oxygen Sensor

Delphi ES10146 Oxygen Sensor Overview

The Delphi ES10146 is a non-heated upstream oxygen sensor built for precise exhaust feedback in older fuel-injected applications. With Delphi OE heritage behind it, this sensor is a direct-fit option for vehicles such as the Ford Escort, Mazda 323, Mazda Protege, and Kia Sephia.

It uses a square connector, 18 x 1.5 mm thread size, and a 480.0 overall length to match the listed applications. This Delphi ES10146 oxygen sensor is also cross-referenced with Monroe Shocks & Struts 172286 and 182286 for the same application.

Key Features

• Non-heated oxygen sensor for upstream placement
• Square connector shape for application-specific fitment
• 18 x 1.5 mm thread size
• 480.0 overall length
• 1-wire sensor design
• Includes oxygen sensor and instruction sheet
• OE-based engineering from Delphi

Detailed Description

Delphi ES10146 is an upstream oxygen sensor for vehicles that rely on a non-heated exhaust feedback design. It is listed for 1990-1994 Mazda 323, 1990-1994 Mazda Protege, 1991-1994 Ford Escort, 1990-1993 Ford Festiva, 1992-1993 Mazda MX-3, 1991 and 1994 Mercury Tracer, 1992-1993 Mercury Tracer with 480mm overall length, and 1994-1995 Kia Sephia. For buyers searching for a Ford Escort oxygen sensor, Mazda Protege upstream O2 sensor, or Kia Sephia replacement sensor, this part number provides a direct application match.

Delphi draws on long OE supply experience, and that background is reflected in the fit, connector style, and thread specification of the ES10146. If you are replacing a worn sensor on a Mazda 323 or Mercury Tracer, the Delphi ES10146 helps restore accurate exhaust signal input to the engine management system.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Rich or lean fuel mixture readings from a failing upstream sensor
• Slow or inaccurate exhaust oxygen feedback
• Driveability issues tied to aging sensor response
• Emissions test failures caused by sensor degradation

Installation Notes and Tips

Confirm the sensor is for upstream placement before installation. Verify the connector shape, 18 x 1.5 mm thread size, and 480.0 overall length against the original part on your Ford Escort, Mazda 323, Mazda Protege, or Kia Sephia. Because this is a non-heated 1-wire sensor, make sure the vehicle uses the same sensor style and wiring configuration before replacement.

Quality Assurance

Delphi builds aftermarket parts using OE experience and supplier knowledge developed over decades of original equipment service. The ES10146 is engineered with that background in mind for consistent fit and function in the listed applications.