Walker 250-54054 Oxygen Sensor - Upstream, Upstream Front or Upstream Rear

Walker OE Oxygen Sensor for Toyota and Lexus

Walker Products OE oxygen sensor Part Number 250-54054 is a specific-fit heated sensor engineered for select Toyota and Lexus applications. It is built to deliver the ECU feedback needed for accurate fuel control and emissions monitoring on vehicles such as the Toyota Camry, RAV4, Sienna, Solara, Highlander, and Lexus RX300 and ES300.

Key Features

• Heated oxygen sensor for precise exhaust feedback
• Specific-fit design for the listed Toyota and Lexus applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 11.34 in.; overall length: 14.88 in.
• Walker Products OE Part Number 250-54054

Product Details

Walker Products OE focuses on replacement engine management sensors built for defined vehicle applications, and this oxygen sensor follows that approach with fitment matched to the exhaust position and ECU requirements. The heated design helps the sensor reach operating temperature quickly for stable signal output, while the threaded mount and vehicle-specific connector support direct replacement on the listed Toyota and Lexus models. This part number 250-54054 is used in upstream rear, upstream front, and upstream positions depending on the vehicle and emissions configuration.

Fits 1997-2000 Toyota Camry, upstream front and upstream rear; fits 1997-2000 Toyota RAV4, upstream; fits 1999-2000 Toyota Sienna, upstream front and upstream rear; fits 1999-2000 Toyota Solara, upstream front and upstream rear; fits 2001-2003 Toyota Highlander, upstream front and upstream rear; fits 1997-1999 Toyota Avalon, upstream front and upstream rear; fits 1997-1998 Lexus ES300, upstream front and upstream rear; fits 1999 Lexus ES300, upstream front and upstream rear; fits 1999-2003 Lexus RX300, upstream front and upstream rear.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Higher exhaust emissions on affected Toyota and Lexus vehicles
• Stored ECU fault codes tied to the sensor circuit or related systems

Installation Notes and Tips

Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion. Confirm the sensor position on the vehicle, since this part is used in multiple upstream locations across the listed applications. Verify thread size, connector style, and harness routing before installation to ensure proper fit on the exhaust system.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates with ISO 9001/TS 16949 certification. Part Number 250-54054 is manufactured as an OE-style replacement for the specified applications and is intended to provide the diagnostic feedback required by the ECU.