Walker 250-54084 Oxygen Sensor

Walker Products OE Oxygen Sensor 250-54084

Walker Products OE 250-54084 is a heated, specific-fit oxygen sensor engineered as an OE replacement for select Subaru, Toyota, Lexus, and Scion applications. It is built for upstream locations where accurate exhaust feedback is needed for ECU fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Overall length: 17.83 in.; wiring harness length: 14.29 in.
• Walker Products OE line for direct-replacement engine management service

Product Details

Walker Products OE focuses on replacement sensors built for the original application, fitment position, and ECU feedback requirements. Part number 250-54084 is used in upstream oxygen sensor locations on vehicles such as the Subaru BRZ, Subaru Crosstrek, Subaru Forester, Subaru Impreza, Toyota 86, Toyota Camry, Toyota RAV4, Toyota Tacoma, Lexus ES350, Lexus RX350, and Scion FR-S. This part number 250-54084 is also listed for additional Toyota and Lexus upstream positions, including front, rear, and right-side applications where specified by the vehicle.

As an oxygen sensor for Subaru BRZ upstream replacement and Toyota Camry upstream oxygen sensor service, this unit supports the ECU’s ability to monitor exhaust oxygen content and adjust fuel delivery. Walker Products has supplied engine management components since 1946 and manufactures sensors for specific vehicle fitments rather than universal use.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust readings
• Elevated exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for sensor or related system issues

Installation Notes

• Confirm the exact position before ordering: upstream, upstream front, upstream rear, or upstream right as listed.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Verify thread size and connector style match the original sensor on the vehicle.
• Use the vehicle’s service information for torque and routing details.

Quality Assurance

Walker Products OE sensors are manufactured as application-specific replacements and produced by an ISO 9001 / TS 16949 certified company. The OE product line is designed to provide the diagnostic feedback expected by the vehicle ECU for the listed Subaru, Toyota, Lexus, and Scion applications.