Walker 350-34417 Oxygen Sensor - Downstream Left

Walker 350-34417 Oxygen Sensor for Lexus IS250 and IS350

Walker Products 350-34417 is a heated oxygen sensor built as a specific-fit OE replacement for select Lexus applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on downstream left positions.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fitment for the correct mounting position
• 4-wire design with male connector
• Threaded mounting type with 18.0 thread diameter
• Wiring harness length: 40.87 in.; overall length: 44.41 in.
• Radiused polygon connector shape for application-specific connection

Application Details

This Walker Products Aftermarket sensor is built for downstream left placement on the Lexus IS250 from 2006-2013 and the Lexus IS350 for 2013. If you are searching for a Lexus IS250 downstream left oxygen sensor or a Walker 350-34417 replacement for a Lexus IS350, this part is matched to the listed vehicle and position.

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as OE-style replacements for worldwide vehicle coverage. The 350-34417 is intended to restore accurate exhaust feedback to the ECU so the engine management system can maintain proper air-fuel control and monitor emissions performance. Walker Products 350-34417 is a direct-fit option for drivers addressing a failed downstream left sensor on the Lexus IS250 or Lexus IS350.

Common Issues This Sensor Can Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Rough engine operation tied to faulty sensor input
• Increased exhaust emissions from inaccurate air-fuel monitoring
• Stored ECU fault codes for the affected downstream sensor circuit

Installation Notes

Verify the connector style, wire count, thread diameter, and downstream left position before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life. Confirm the vehicle’s ECU fault codes and application details before replacing the sensor.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates with Automotive ISO9001/TS 16949 certification. The brand’s oxygen and air-fuel sensors are manufactured for application-specific fitment and ECU feedback requirements.