Walker 250-54066 Oxygen Sensor

Walker Products OE Oxygen Sensor 250-54066

Walker Products OE 250-54066 is a heated, specific-fit oxygen sensor engineered as an OE replacement for select Lexus and Toyota applications. It is built for the correct mounting position and ECU feedback requirements, helping restore accurate exhaust monitoring on vehicles such as the Lexus IS350 and Toyota Corolla.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed upstream positions
• 4-wire configuration with male connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 12.32 in.; overall length: 15.87 in.
• Walker Products OE line replacement for select Lexus and Toyota models

Product Details

Walker Products OE focuses on application-specific engine management sensors built to match the original equipment layout and diagnostic needs of the vehicle. Part number 250-54066 is an upstream oxygen sensor used in select Lexus and Toyota platforms, including fitments such as 2022-2026 Lexus LC500 upstream right, 2019-2025 Lexus IS350 upstream right, and 2011-2021 Toyota Corolla upstream. The sensor is designed to provide the ECU with the feedback needed for fuel control and emissions monitoring.

This part cross-references Denso and Bosch for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough running caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for sensor circuit or response issues

Installation Notes

• Confirm the exact year, make, model, and upstream position before ordering.
• Match the left, right, or front location shown in the fitment list.
• Inspect the sensor wiring harness and connector for heat damage or physical wear before installation.
• Use the threaded mounting point and connector style specified for the vehicle application.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures to ISO 9001 / TS 16949 standards. Part number 250-54066 is produced as an OE-style replacement for the listed Lexus and Toyota applications.