Delphi ES20171 Oxygen Sensor - Front or Rear

Delphi ES20171 Oxygen Sensor Overview

The Delphi ES20171 is a heated oxygen sensor built for direct replacement in select Kia Spectra and Suzuki Forenza applications. It combines OE-based engineering with the sensor specifications needed for accurate exhaust monitoring and emissions system performance.

Compatible With 2002-2004 Kia Spectra, front and rear, and 2006-2008 Suzuki Forenza, rear. The Delphi ES20171 oxygen sensor is a practical choice when replacing a worn sensor that can affect fuel control and emissions readings.

Key Features

• Heated oxygen sensor for faster operating temperature
• 4-wire design for common OE-style signal and heater circuit layouts
• Square connector shape for application-specific fitment
• 18 x 1.5 mm thread size
• Overall length: 550.0
• Includes oxygen sensor and instruction sheet
• Position-specific coverage for front or rear applications, depending on vehicle

Detailed Description

Delphi ES20171 is engineered from the brand’s OE heritage and decades of supplier experience with major automakers. That background is reflected in the sensor’s construction and application coverage for the Kia Spectra and Suzuki Forenza. For buyers searching for a 2002-2004 Kia Spectra oxygen sensor or a 2006-2008 Suzuki Forenza rear oxygen sensor, this part number provides a direct replacement option with the correct heated, 4-wire configuration.

This part cross-references Bosch 15643 and DENSO Auto Parts 234-4423 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings
• Reduced fuel economy caused by a failing sensor
• Emissions test failures tied to sensor response issues
• Rough idle or drivability concerns linked to exhaust feedback errors

Installation Notes and Tips

Verify the exact position on your vehicle before ordering, since ES20171 is listed for both front and rear locations depending on application. Confirm the connector shape, thread size, and wire count against the original sensor before installation. Use the vehicle application details to match the correct 2002-2004 Kia Spectra or 2006-2008 Suzuki Forenza placement.

Quality Assurance

Delphi builds this oxygen sensor using OE-focused engineering and application knowledge developed through long-term supplier experience with leading automakers. That OE background supports consistent fitment and sensor performance for the listed Kia Spectra and Suzuki Forenza applications.