Delphi ES10533 Oxygen Sensor - Front

Delphi ES10533 Oxygen Sensor Overview

The Delphi ES10533 is a front oxygen sensor built for specific Ford and Mazda applications. It uses a non-heated, single-wire design with a square connector and 18 x 1.5 mm thread size for direct replacement service on listed vehicles.

Delphi draws on OE experience and supplier knowledge developed over decades of original-equipment work, bringing that engineering background into this aftermarket oxygen sensor.

Key Features

• Part number: ES10533
• Sensor type: non-heated
• Wire quantity: 1
• Connector shape: square
• Thread size: 18 x 1.5 mm
• Overall length: 375.0
• Front position application
• Package contents: oxygen sensor and instruction sheet

Fitment Details

Compatible with 1996-1997 Ford Aspire, front. Compatible with 1994-1995 Ford Aspire and 1989-1991 Mazda RX-7 for listed applications. This part number, ES10533, is also referenced for the same application under select cross-reference listings such as DENSO 234-1020 and Walker Products 250-21026.

What This Sensor Helps Address

• Faulty oxygen sensor readings
• Check engine light concerns related to the front sensor circuit
• Rough idle or drivability issues tied to air-fuel feedback
• Emissions test failures caused by a worn sensor
• Delayed or inaccurate fuel mixture correction

Installation Notes

Verify the connector shape, thread size, wire count, and front position before installation. Compare the removed sensor to the ES10533 to confirm the correct application on Ford Aspire and Mazda RX-7 listings. Follow the included instruction sheet and use proper exhaust-thread service practices during replacement.

Quality Assurance

Delphi builds this oxygen sensor using OE heritage and supplier knowledge developed through work with major automakers. That background supports consistent fitment and service characteristics for the listed Ford Aspire and Mazda RX-7 applications.