Delphi ES10856 Oxygen Sensor - Front, Front Right or Rear

Delphi ES10856 Oxygen Sensor Overview

Delphi ES10856 is a heated oxygen sensor built for precise exhaust monitoring and OE-style replacement performance. Backed by Delphi’s century of original equipment experience, it brings application-specific engineering to vehicles such as Mazda 6, Kia Rio, Mazda 626, and Suzuki Forenza.

Use Delphi ES10856 when you need a direct-fit oxygen sensor for front or rear locations, depending on the vehicle application. The square connector, 4-wire design, and 18 x 1.5 mm thread size support straightforward replacement on the listed fitments.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire design with square connector
• 18 x 1.5 mm thread size for listed applications
• Overall length: 440.0
• Package includes oxygen sensor and instruction sheet
• Fits front, front right, and rear positions depending on vehicle application

Detailed Description

Delphi ES10856 is an emission control sensor engineered for vehicles that rely on accurate air-fuel feedback to manage engine performance and emissions. It is compatible with 2003-2008 Mazda 6, front right; 2001-2005 Kia Rio, rear; 2001-2005 Kia Rio, front; 2004-2005 Suzuki Forenza, front; 2001-2002 Mazda 626, front right; and 2000 Mazda 626, front right with California Emission System. This part number, ES10856, is also a useful cross-reference for shoppers comparing OE-style replacement options.

Delphi’s OE heritage is reflected in the sensor’s application-specific design and fitment-focused construction. For buyers searching for a Mazda 6 front right oxygen sensor, a Kia Rio rear oxygen sensor, or a Suzuki Forenza front oxygen sensor, ES10856 provides a direct replacement path for the listed vehicles.

Common Issues This Sensor May Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn sensor
• Reduced fuel control accuracy during closed-loop operation
• Emissions test failures tied to sensor response issues
• Rough idle or drivability concerns caused by faulty exhaust feedback

Installation Notes and Tips

Confirm the exact position on your vehicle before ordering, since ES10856 is listed for front, front right, and rear applications. Verify connector shape, wire count, and thread size against the original sensor before installation. Follow the included instruction sheet and inspect the harness routing, exhaust access, and sensor threads during replacement.

Quality Assurance

Delphi builds this oxygen sensor using OE experience and original-equipment engineering knowledge developed over decades of supplying major automakers. That background supports consistent fitment and sensor design for the listed applications.