Delphi ES20087 Oxygen Sensor - Front, Rear or Right

Delphi ES20087 Oxygen Sensor Overview

The Delphi ES20087 is a heated oxygen sensor built for precise exhaust feedback in select Mazda, Kia, Ford, and Mercury applications. It draws on Delphi’s OE heritage and decades of supplier experience to deliver the sensor specifications needed for accurate air-fuel control and emissions monitoring.

Compatible With 1992-2000 Mazda Miata, Mazda Protege, Mazda MX-3, Kia Sephia, Ford Escort, and Mercury Tracer applications where the listed position and emissions setup match.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire design with square connector shape
• 18 x 1.5 mm thread size for direct-thread applications
• Overall length: 550.0
• Package contents: oxygen sensor and instruction sheet
• Position-specific coverage for front, rear, and right locations depending on vehicle application

Detailed Description

Delphi ES20087 is an emission control sensor engineered for vehicles that rely on accurate exhaust oxygen readings to manage fuel delivery and catalyst performance. This part number ES20087 is listed for front, rear, and right positions across specific Mazda, Kia, Ford, and Mercury models, including 1999-2000 Mazda Miata rear with California Emission System, 1999-2000 Mazda Protege front without California Emission System, 1995-1998 Mazda Protege front, 1995-1997 Kia Sephia front, 1995-1996 Ford Escort front, 1995-1996 Mercury Tracer front, 1994 Mazda MX-3 right without California Emission System, 1994 Mazda Protege, and 1992-1993 Mazda MX-3 right. This part cross-references Bosch 15322 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect fuel trim readings from a worn sensor
• Reduced emissions monitoring accuracy
• Slow sensor response during closed-loop operation
• Driveability issues tied to exhaust feedback faults

Installation Notes

Verify the exact position on your vehicle before ordering, since ES20087 is listed for front, rear, and right locations depending on application. Confirm the connector shape, 4-wire configuration, and 18 x 1.5 mm thread size against the original sensor. Use the application tab to match the correct fitment for your Mazda Miata, Mazda Protege, Mazda MX-3, Kia Sephia, Ford Escort, or Mercury Tracer.

Quality Assurance

Delphi builds aftermarket parts using OE experience and knowledge developed through long-term supplier relationships with major automakers. That OE background is reflected in the ES20087 oxygen sensor design and application coverage.