Walker 350-34040 Oxygen Sensor

Walker 350-34040 Oxygen Sensor Overview

Walker Products 350-34040 is a heated oxygen sensor built as a specific-fit OE replacement for select vehicles. It is engineered to deliver the ECU feedback needed for accurate air-fuel control, emissions monitoring, and fault-code diagnosis.

Compatible With Chevrolet Aveo, Chevrolet Aveo5, Pontiac G3, Pontiac Wave, Mazda 626, Mazda MX-6, Ford Probe, and Mazda 929 applications across the listed upstream and downstream positions.

Key Features

• Heated oxygen sensor design for faster operating response
• Specific-fit application for the listed vehicle positions
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific fitment
• 16.46 wiring harness length and 20.0 overall length
• Walker Products Aftermarket line engineered for OE-style replacement needs

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors developed for replacement use on a wide range of vehicles. Part number 350-34040 is built for the specified fitment position so the ECU receives the correct diagnostic feedback. This matters on vehicles such as the Chevrolet Aveo and Chevrolet Aveo5, where upstream sensor performance directly affects fuel control and emissions monitoring.

When an oxygen sensor begins to fail, common results include rough engine operation, higher fuel consumption, increased exhaust emissions, and a malfunction indicator light. Because the sensor works with the wiring harness and connector as part of the system, physical damage in those areas should also be checked during diagnosis.

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

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rich or lean air-fuel mixture concerns
• Reduced fuel economy from inaccurate exhaust feedback
• Elevated exhaust emissions during inspection
• Rough running caused by faulty upstream or downstream sensor input

Installation Notes

Confirm the exact year, make, model, and sensor position before ordering. This Walker 350-34040 oxygen sensor uses a threaded mount and a vehicle-specific connector, so match the connector shape, wire count, and harness length to the original part. Inspect the sensor wiring and connector for heat damage, corrosion, or abrasion before installation.

Fits 2018 Chevrolet Aveo, upstream; 2012-2017 Chevrolet Aveo, upstream; 2008 Chevrolet Aveo, upstream; 2012-2017 Chevrolet Aveo, upstream; 2008 Chevrolet Aveo, upstream; 2008 Chevrolet Aveo5, upstream; 2006 Chevrolet Aveo5, upstream; 2008 Chevrolet Aveo5, upstream; 2006 Chevrolet Aveo5, upstream; 2007-2008 Pontiac G3, upstream; 2006-2008 Pontiac Wave, upstream; 2006-2007 Chevrolet Aveo, upstream; 2007 Chevrolet Aveo5, upstream; 2000 Mazda 626, upstream rear; 1994-1995 Mazda 626, upstream rear; 1998-1999 Mazda 626, upstream rear; 1993 Mazda 626, upstream rear; 1996-1997 Mazda 626, downstream; 1996-1997 Mazda MX-6, downstream; 1994-1995 Ford Probe, upstream rear; 1994-1995 Ford Probe, upstream front; 1992-1995 Mazda 929, upstream left; 1994-1995 Mazda MX-6, upstream rear; 1993 Ford Probe, upstream rear; 1993 Ford Probe, upstream front; 1993 Mazda MX-6, upstream rear.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34040 is manufactured for the specified application and fitment position to support proper ECU feedback on the listed vehicles.