Walker 350-34491 Oxygen Sensor

Walker 350-34491 Oxygen Sensor Overview

Walker Products 350-34491 is a heated oxygen sensor built as a specific-fit OE replacement for select GM and Saab applications. It is engineered to provide the ECU with the exhaust feedback needed for accurate fuel control, emissions monitoring, and fault detection.

Use this Walker Products Aftermarket sensor when servicing downstream or upstream oxygen sensor locations on vehicles such as the Chevrolet Cruze, Chevrolet Sonic, Buick Encore, and Chevrolet Trax.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with female radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 13.31 in.
• Overall length: 16.85 in.
• Wire gauge: 20

Detailed Description

Walker Products 350-34491 is part of the Walker Products Aftermarket engine management and oxygen/air-fuel sensor line, developed as an OE-style replacement for many vehicles worldwide. This sensor is manufactured for the specified application and position so it can deliver the diagnostic feedback the ECU expects. For fitment-based searches, this part is commonly referenced for 2010-2015 Chevrolet Cruze downstream, 2012-2020 Chevrolet Sonic downstream, 2013-2021 Buick Encore downstream, and 2014-2021 Chevrolet Trax downstream applications. It also appears in upstream and downstream service positions on select Cadillac SRX, Saab 9-5, and Pontiac G8 models. The part number 350-34491 is also useful when cross-checking service records or ordering by OE-style reference.

Walker Products has focused on engine management and fuel system components since 1946, and its sensor catalog is built around application-specific fitment and ECU feedback requirements. This makes 350-34491 a practical choice for technicians and owners servicing emissions-related sensor faults on Chevrolet Cruze, Chevrolet Sonic, Buick Encore, and Chevrolet Trax platforms.

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 sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is listed for specific upstream and downstream locations depending on vehicle and engine configuration. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. The threaded mounting style and 18.0 mm thread diameter should be matched to the original sensor location, and the connector shape and wire count should be verified against the vehicle harness. For fitment-based searches, verify the exact application on the Chevrolet Cruze, Chevrolet Sonic, Buick Encore, or Chevrolet Trax before installation.

Quality Assurance

Walker Products is an ISO 9001/TS 16949 certified automotive company, and this sensor is built around application-specific replacement requirements for ECU feedback and emissions control. The Walker Products Aftermarket line is organized for OE-style fitment and catalog accuracy across modern vehicle platforms.