Walker 350-34255 Oxygen Sensor - Downstream

Walker 350-34255 Oxygen Sensor Overview

Walker Products 350-34255 is a heated oxygen sensor built as a specific-fit OE replacement for select Chevrolet Aveo, Chevrolet Aveo5, Pontiac Wave, and Suzuki Verona applications. It is designed for downstream use and provides the ECU with the feedback needed to monitor exhaust performance after the catalytic converter.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for application-specific fitment and diagnostic response. The 350-34255 follows that approach with a threaded mounting design, 4-wire heated construction, and a connector layout matched to the listed vehicle applications.

Key Features

• Part number: 350-34255
• Heated oxygen sensor for downstream placement
• Specific-fit design for listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon connector shape with male connector
• Wiring harness length: 16.26
• Overall length: 19.8

Detailed Product Description

This Walker oxygen sensor is intended for downstream exhaust monitoring on select 2006-2018 Chevrolet Aveo, 2006-2008 Chevrolet Aveo5, 2006 Pontiac Wave, and 2006 Suzuki Verona models. It is a direct-fit style replacement for vehicles that require a heated downstream sensor with the correct connector, harness length, and mounting thread specification. For shoppers searching for a downstream oxygen sensor for Chevrolet Aveo B1S2 service or a replacement oxygen sensor for Chevrolet Aveo5 downstream applications, Walker 350-34255 is built to match the listed positions and vehicle-specific requirements.

As an engine management sensor, this part helps the ECU evaluate exhaust conditions after the catalyst. Walker Products develops these sensors as OE-style replacements for worldwide vehicle coverage, with application-specific feedback characteristics and fitment positioning. This part number 350-34255 is listed for downstream use only and should be matched to the exact vehicle, engine configuration, and sensor location shown in the fitment data.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor engine performance caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel monitoring
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

• Confirm the vehicle year, make, model, and downstream position before ordering.
• Verify the connector shape, wire count, and thread diameter against the original sensor.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Use the listed fitment notes for bank and sensor location on Chevrolet Aveo and Chevrolet Aveo5 applications.
• For Suzuki Verona applications, confirm cylinder-bank notes and post-catalyst sensor length requirements.

Quality Assurance

Walker Products Aftermarket has supplied engine management components since 1946 and operates with Automotive ISO9001/TS 16949 certification. The 350-34255 is manufactured for the specified application and position to support the diagnostic feedback expected by the vehicle ECU.