Walker 350-34102 Oxygen Sensor

Walker 350-34102 Oxygen Sensor for Lexus and Toyota

Walker Products 350-34102 is a heated oxygen sensor built as a specific-fit OE replacement for select Lexus and Toyota applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. The 350-34102 follows that approach with a threaded mounting design, 4-wire heated construction, and a connector layout matched to the vehicle position.

Key Features

• Specific-fit heated oxygen sensor for targeted vehicle applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire design with 20-gauge wiring
• Wiring harness length: 15.28 in.
• Overall length: 18.82 in.
• Radiused polygon connector shape with male connector gender
• OE replacement design for downstream and upstream positions listed below

Product Details

The Walker 350-34102 oxygen sensor is designed for vehicles that rely on accurate exhaust feedback to manage air-fuel ratio, emissions, and engine performance. When an oxygen sensor begins to fail, the ECU may store fault codes and the vehicle can run rich or lean, use more fuel, or trigger the malfunction indicator light. This sensor is built to replace the original unit in the specified position, including downstream and selected upstream applications on Lexus ES300, ES330, ES350, GS300, GS200t, IS200t, IS300, RC200t, RC300, and Toyota Avalon, Camry, and Solara models.

Fits 2022-2025 Lexus IS300, downstream. Fits 2022-2025 Lexus RC300, downstream. Fits 2018-2021 Lexus IS300, downstream. Fits 2018-2021 Lexus RC300, downstream. Fits 2018-2019 Lexus GS300, downstream. Fits 2015-2018 Lexus ES350, downstream right. Fits 2016-2018 Toyota Avalon, downstream rear. Fits 2005-2014 Toyota Avalon, downstream rear. Fits 2016-2017 Lexus GS200t, downstream. Fits 2016-2017 Lexus IS200t, downstream. Fits 2017 Lexus RC200t, downstream. Fits 2016-2017 Toyota Camry, downstream rear. Fits 2002-2014 Toyota Camry, downstream rear. Fits 2016 Lexus RC200t, downstream. Fits 2015 Toyota Avalon, downstream rear. Fits 2015 Toyota Camry, downstream rear. Fits 2014 Lexus ES350, downstream rear. Fits 2007-2013 Lexus ES350, downstream rear. Fits 2004-2008 Toyota Solara, downstream rear. Fits 2004-2006 Lexus ES330, downstream front. Fits 1998-2005 Lexus GS300, upstream. Fits 2002-2003 Lexus ES300, downstream front.

What It Can Help Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Rough running or inconsistent air-fuel control
• Elevated exhaust emissions from a worn sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the exact position before installation, since this part is listed for downstream, downstream rear, downstream right, downstream front, and upstream applications depending on vehicle. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement. Make sure the threaded mounting point is clean and that the connector routing matches the original layout to avoid strain on the harness.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 350-34102 is built as an OE-style replacement for the specified application and position, with fitment and feedback characteristics intended to match the vehicle’s original sensor requirements.