Walker 350-34141 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34141 Oxygen Sensor for Lexus

Walker Products 350-34141 is a heated oxygen sensor built as an OE-style replacement for specific Lexus applications. It is engineered for the correct fitment position and ECU feedback on downstream right and downstream left locations across select GS, IS, and GS F models.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for precise application matching. The 350-34141 reflects that approach with a specific-fit design, threaded mounting, a 4-wire layout, and a radiused polygon male connector for the listed Lexus vehicles.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for listed Lexus GS450h, GS350, GS430, IS F, IS250, and IS350 applications
• 4-wire sensor with 20-gauge wiring
• 19.21 in. wiring harness length and 22.76 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Radiused polygon male connector for application-specific connection

Detailed Description

The Walker 350-34141 oxygen sensor is designed for downstream right and downstream left positions on select Lexus vehicles, including 2006-2017 Lexus GS450h, 2007-2014 Lexus GS350, 2007 Lexus GS430, 2008-2014 Lexus IS F, 2006-2013 Lexus IS250, and 2006-2013 Lexus IS350. It is a direct-fit replacement for vehicles that require accurate exhaust feedback to the ECU, helping maintain proper sensor reporting in the emissions control system.

As part of the Walker Products Aftermarket line, this sensor is built around application-specific fitment rather than universal coverage. The part number 350-34141 is intended for the exact mounting position and connector style listed for the vehicle, which is important when replacing a failed downstream oxygen sensor on Lexus GS and IS platforms.

This part cross-references Walker Products 350-34141 for the same application.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor engine performance caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from a failing oxygen sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Verify the exact year, model, and sensor position before ordering. This Walker 350-34141 is listed for downstream right and downstream left locations only, depending on the vehicle application. Inspect the sensor wiring harness and connector for damage before installation, and confirm the threaded mounting point and connector style match the original part.

For Lexus GS450h, GS350, GS430, IS F, IS250, and IS350 applications, confirm whether the vehicle requires the left or right downstream sensor and check the production date notes shown in the fitment data.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts and manufactured under Automotive ISO9001/TS 16949 certification standards. The 350-34141 is built to support the diagnostic feedback expected by the ECU in the listed Lexus applications.