Walker 350-34501 Oxygen Sensor

Walker 350-34501 Oxygen Sensor Overview

Walker 350-34501 is a heated oxygen sensor built as a specific-fit OE replacement for select Lexus, Toyota, and Scion applications. It is engineered to provide the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Walker Products Aftermarket focuses on application-specific engine management sensors, and this part number is matched to the required mounting position and connector style for the listed vehicles.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific fitment for the listed Lexus, Toyota, and Scion applications
• 4-wire design with 20-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 11.73 in.; overall length: 15.28 in.

Detailed Description

Walker Products 350-34501 is designed for downstream oxygen sensor locations where the ECU relies on accurate exhaust-gas feedback to manage air-fuel strategy and emissions diagnostics. This sensor is a direct-fit replacement for applications including Lexus GS450h, LS460, RX350, RX400h, RX330, RX450h, HS250h, Toyota Camry, Highlander, Sienna, Solara, Venza, Corolla iM, Scion iM, xB, and tC. It is also listed for specific downstream left, downstream front, and downstream rear positions depending on the vehicle.

Walker Products Aftermarket builds engine management and oxygen/air-fuel sensors as OE-style replacements for worldwide vehicle coverage. Part number 350-34501 is manufactured for the specified application and position so the ECU receives the correct diagnostic feedback. This part cross-references Walker Products Aftermarket 350-34501 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing heated O2 sensor
• Rough engine operation tied to incorrect air-fuel correction
• Stored ECU fault codes for the affected sensor circuit

Installation Notes and Tips

• Confirm the exact position before ordering: downstream left, downstream front, downstream rear, or downstream.
• Verify connector shape, wire count, and thread diameter against the original sensor.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Use the vehicle’s emissions configuration and build date when checking fitment on 2014-2015 Lexus and Toyota applications.
• For 2003 Toyota Camry and related listings, confirm the emissions package and California/non-California notes.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company with long-standing experience in engine management and fuel system components. The 350-34501 oxygen sensor is built for application-specific fitment and diagnostic performance on the listed vehicles.