Walker 250-54059 Oxygen Sensor

Walker 250-54059 Oxygen Sensor Overview

Walker Products OE 250-54059 is a heated oxygen sensor built as a direct-fit replacement for specific Lexus and Toyota applications. It is engineered for the correct mounting position and ECU feedback, helping maintain accurate air-fuel monitoring on vehicles such as the Toyota Camry, Lexus ES350, and Toyota Tacoma.

Walker Products OE focuses on application-specific engine management sensors, with this oxygen sensor matched to the required fitment position, connector style, and threaded mounting design for the listed vehicles.

Key Features

• Heated oxygen sensor for precise exhaust feedback
• Specific fit design for the listed Lexus and Toyota applications
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for OE-style connection
• 18.0 mm thread diameter with threaded mounting type
• Overall length: 15.87 in.; wiring harness length: 12.32 in.

Detailed Description

Walker 250-54059 is designed for vehicles that require a direct replacement oxygen sensor in upstream or downstream positions, depending on application. This part supports ECU feedback by monitoring exhaust oxygen content, which is critical for fuel control and emissions performance. It is listed across multiple Toyota and Lexus models, including the Lexus RX350, Toyota Avalon, and Toyota RAV4, with fitment that varies by year, engine layout, and sensor location.

Walker Products OE has developed this sensor as an OEM-style replacement for global vehicle coverage, with application-specific fitment and connector design. The part number 250-54059 is also referenced for select Toyota Camry and Lexus ES350 applications where the correct upstream or rear sensor position is required.

What It Helps Address

• Check engine light or MIL illumination related to oxygen sensor faults
• Poor engine performance caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Higher exhaust emissions from a failing heated oxygen sensor
• Diagnostic trouble codes stored in the ECU for sensor-related issues

Installation Notes and Tips

Verify the exact year, make, model, and sensor position before ordering. This part is listed for upstream right, upstream rear, upstream left, upstream front, upstream, and downstream positions depending on the vehicle. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect readings. For fitment examples, this part fits 2022-2023 Toyota Camry, upstream right; fits 2016-2021 Lexus RX350, upstream front; and fits 2017-2021 Toyota Tacoma, upstream.

Quality Assurance

Walker Products OE has been manufacturing engine management components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 250-54059 is built to match the specified application and provide the diagnostic feedback expected by the vehicle ECU. This part cross-references Denso 234-9005 for the same application.