Walker 350-34641 Oxygen Sensor

Walker 350-34641 Oxygen Sensor Overview

Walker Products 350-34641 is a heated oxygen sensor built as a specific-fit OE replacement for select Toyota, Lexus, Scion, and Pontiac applications. It is designed to deliver the ECU feedback needed for proper fuel control and emissions monitoring, especially on downstream positions where accurate exhaust readings matter.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for application-specific fitment. The 350-34641 follows that approach with the correct mounting style, connector layout, and wiring configuration for the listed vehicles.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for proper harness connection
• Wiring harness length: 16.85
• Overall length: 20.39
• Walker Products part number 350-34641

Detailed Application Notes

This oxygen sensor is used in downstream and related sensor positions across a wide range of vehicles, including 2006-2014 Toyota Yaris, 2008-2014 Scion xD, 2004-2006 Scion xA, 2004-2006 Scion xB, 2003-2006 Toyota Matrix, 2000-2005 Toyota Echo, 2001-2003 Toyota Prius, and 2003-2006 Pontiac Vibe. It also covers select Lexus applications such as 2008-2011 GS460, 1998-2000 SC300, 1995-1997 GS300, 1994-1996 ES300, and 1993-1994 GS300, plus 1992-1993 ES300 and Camry California emissions applications. For 2015 Toyota Yaris, the listed coverage includes downstream Bank 1 Sensor 2 configurations by production date. If you are searching for a Walker 350-34641 oxygen sensor for a Toyota Yaris downstream replacement or a Lexus GS460 downstream sensor, this part number is the application-specific option to verify against your vehicle build.

This part cross-references no listed aftermarket part numbers in the provided data.

What It Helps Address

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

Installation Notes

Confirm the exact position before ordering, since this part is listed for downstream, downstream front, downstream left, downstream right, and upstream applications depending on vehicle and engine configuration. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Verify thread size, connector shape, and harness routing against the original sensor to ensure proper fitment on the vehicle.

Quality Assurance

Walker Products manufactures engine management sensors as OE-style replacements and operates under Automotive ISO9001/TS 16949 certification. The brand has supplied fuel system and sensor components since 1946, with application-specific cataloging for modern vehicle fitment.