Walker 350-34098 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34098 Oxygen Sensor Overview

Walker Products 350-34098 is a heated oxygen sensor built as a specific-fit OE replacement for select Cadillac and Chevrolet applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance on the vehicles listed below.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. The 350-34098 follows that approach with a threaded, 4-wire design and a female radiused polygon connector for downstream left installation points.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for direct application matching
• 4-wire configuration with 22-gauge wiring
• Female radiused polygon connector
• 18.0 mm thread diameter and threaded mounting type
• 11.34 in. wiring harness length and 14.88 in. overall length

Detailed Product Description

The Walker Products 350-34098 oxygen sensor is designed for downstream left or downstream right positions depending on the vehicle application. It is a direct replacement style sensor for 2008-2015 Cadillac CTS, 2008-2011 Cadillac STS, and 2010-2015 Chevrolet Camaro applications listed in the fitment data. Use this part number when searching for a downstream left oxygen sensor for Cadillac CTS or Chevrolet Camaro, or when replacing a downstream oxygen sensor on a Cadillac STS.

As an OE-style emissions sensor, this unit supports the ECU’s ability to monitor exhaust content and adjust system operation. A failing oxygen sensor can contribute to rough engine performance, higher fuel use, increased exhaust emissions, and a malfunction indicator light. The sensor, connector, and wiring should be inspected for damage during diagnosis.

This part number, 350-34098, is part of Walker Products Aftermarket engine management coverage for vehicles requiring a specific downstream oxygen sensor location.

What It May Help Resolve

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

Installation Notes and Tips

Confirm the exact position before installation. This sensor is listed for downstream left and downstream right applications only where shown in the fitment table. Verify connector shape, wire count, and thread diameter against the original sensor before replacement. Inspect the harness and connector for heat damage, corrosion, or broken terminals, since those issues can shorten sensor life or trigger repeat faults.

• Fits 2014-2015 Chevrolet Camaro, downstream left
• Fits 2010-2013 Chevrolet Camaro, downstream left
• Fits 2014 Cadillac CTS, downstream left
• Fits 2009-2013 Cadillac CTS, downstream left
• Fits 2008-2009 Cadillac CTS, downstream right
• Fits 2008 Cadillac CTS, downstream left
• Fits 2008-2011 Cadillac STS, downstream left

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 350-34098 is manufactured for specific application fitment and ECU feedback requirements.