Delphi ES20392 Oxygen Sensor - Rear

Rear Oxygen Sensor for Lexus IS300

Delphi ES20392 is a rear oxygen sensor for 2001-2005 Lexus IS300 applications with cylinders 1 through 3. Built from Delphi’s OE heritage and decades of supplier experience, it is made for accurate exhaust monitoring in the rear sensor location.

Key Features

• Rear-position oxygen sensor for the Lexus IS300
• Fits 2001-2005 Lexus IS300, rear, cylinders 1 through 3
• Includes oxygen sensor and instruction sheet
• OE-based engineering from Delphi’s aftermarket program
• Part number ES20392 for direct lookup and ordering

Product Details

Delphi ES20392 is an emission control sensor built for rear exhaust monitoring on the Lexus IS300. Delphi draws on more than a century of OE experience and supplier knowledge used by major automakers, bringing that background into this aftermarket oxygen sensor. This part cross-references DENSO Auto Parts 234-4015 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to rear oxygen sensor performance
• Fault codes tied to rear exhaust mixture monitoring
• Slow or inaccurate sensor response in the rear position
• Failed emissions inspection caused by sensor-related faults
• Driveability concerns linked to incorrect exhaust feedback

Installation Notes

Fits 2001-2005 Lexus IS300, rear, cylinders 1 through 3. Confirm the rear sensor location and engine application before installation. Compare the connector, harness routing, and sensor placement to the original unit, and follow the included instruction sheet during replacement. The part number ES20392 should be matched to the vehicle’s rear oxygen sensor position before installation.

Quality Assurance

Delphi builds this oxygen sensor using OE-focused engineering and manufacturing knowledge developed through long-term supplier relationships with leading automakers. That OE background supports consistent fitment and application-specific performance for Lexus IS300 rear sensor replacement.