Walker 350-34633 Oxygen Sensor

Walker Oxygen Sensor for OE-Style Fitment

Walker Products Aftermarket oxygen sensor Part Number 350-34633 is a specific-fit heated sensor engineered for direct replacement use on select GM applications. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper air-fuel control and emissions performance.

Compatible With Buick Regal, Buick Verano, Chevrolet Equinox, GMC Terrain, and other listed applications, this Walker oxygen sensor is designed around the vehicle’s original mounting position and connector style for a straightforward replacement.

Key Features

• Heated oxygen sensor for upstream and selected downstream applications
• Specific-fit design for the listed vehicle positions
• 4-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 19.21 in.; overall length: 22.76 in.
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products Aftermarket 350-34633 is part of the Walker Products engine management and oxygen/air-fuel sensor line, developed as an OE replacement for many vehicles worldwide. This sensor is intended to restore accurate exhaust feedback to the ECU, which is critical for fuel control, emissions monitoring, and fault-code diagnosis. When an oxygen sensor begins to fail, common symptoms can include poor engine performance, increased fuel consumption, higher exhaust emissions, and a malfunction indicator light.

This part number is listed for multiple GM platforms, including Fits 2011-2017 Buick Regal, upstream; Fits 2012-2017 Buick Verano, upstream; Fits 2015-2017 Chevrolet Equinox, upstream; Fits 2015-2017 GMC Terrain, upstream; and additional upstream and downstream applications across Chevrolet Silverado, GMC Sierra, Cadillac, Buick, Pontiac, Saturn, and Chevrolet Express/Savana models. Part Number 350-34633 is also referenced for select 2003-2016 GM trucks, vans, and passenger vehicles in the positions shown in the fitment list.

Walker Products Aftermarket focuses on application-specific sensor design, and Part Number 350-34633 reflects that approach with the correct fitment position, connector style, and sensor configuration for the listed vehicles.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running caused by incorrect exhaust feedback
• Higher fuel consumption from inaccurate air-fuel readings
• Elevated exhaust emissions
• Fault codes stored in the ECU for sensor-related issues

Installation Notes and Tips

Verify the vehicle’s exact year, make, model, and sensor position before ordering. For best results, inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation. On newer vehicles, stored ECU fault codes may point to the affected sensor or related systems, so confirm the diagnosis before replacement. This part uses threaded mounting and a female connector; match the connector shape and wire count to the original unit.

Quality Assurance

Walker Products is an automotive ISO 9001/TS 16949 certified company with a long history in engine management components. Since 1946, the brand has supplied oxygen sensors and fuel system parts for vehicle service applications, and Part Number 350-34633 is built to meet the requirements of the listed OE-style fitments.