Delphi ES10931 Oxygen Sensor - Front Left or Front Right

OE-Style Oxygen Sensor for Toyota and Lexus

Delphi ES10931 is a front oxygen sensor built for specific Toyota and Lexus applications that use an air-fuel ratio sensor at the front left or front right position. It combines OE heritage with application-specific fitment for 2000-2004 Toyota Avalon, 2001-2003 Toyota RAV4, Sienna, and Solara, plus 2000-2001 Lexus ES300 and 2001 Toyota Camry.

Key Features

• Part number ES10931 for direct reference and catalog matching
• 4-wire design with a square connector shape
• 18 x 1.5 mm thread size for the specified mounting location
• 350.0 overall length for vehicle-specific routing
• Includes oxygen sensor and instruction sheet
• Fits front left and front right positions, depending on application

Detailed Description

Delphi ES10931 is an emission control sensor engineered for front air-fuel ratio monitoring on select Toyota and Lexus vehicles. Delphi draws on more than 100 years of OE experience and supplier knowledge used by major automakers, bringing OE-based design and manufacturing insight to this aftermarket oxygen sensor. This part number ES10931 is listed for 2000-2004 Toyota Avalon, 2001-2003 Toyota RAV4, 2001-2003 Toyota Sienna, 2001-2003 Toyota Solara, 2000-2001 Lexus ES300, and 2001 Toyota Camry in both Japan-built and USA-built configurations.

This part cross-references DENSO Auto Parts (e.g., 234-9021, 234-9028) for the same application.

What It Helps Address

• Check engine light related to front oxygen sensor performance
• Incorrect air-fuel ratio readings at the front sensor location
• Rough idle or drivability issues tied to sensor signal problems
• Failed emissions inspection caused by a faulty upstream sensor
• Fuel trim concerns from inaccurate exhaust feedback

Installation Notes and Tips

Verify the exact position before ordering, since this sensor is listed for front left and front right locations depending on the vehicle. Confirm the square connector, 4-wire layout, and 18 x 1.5 mm thread size against the original part before installation. Use the vehicle application details to match the correct side on Toyota Camry, Toyota Avalon, Lexus ES300, and the other listed models.

Quality Assurance

Delphi builds this sensor with OE heritage and application knowledge developed through long-term supplier experience with major automakers. That background supports consistent fitment and sensor design for the specified Toyota and Lexus front air-fuel ratio sensor applications.