Walker 350-34301 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34301 Oxygen Sensor Overview

Walker Products 350-34301 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for downstream applications. It is built for vehicles that rely on accurate exhaust feedback to help the ECU manage fuel control and emissions monitoring.

Use this Walker Products Aftermarket sensor for select Chevrolet Caprice and Pontiac G8 models when diagnosing a downstream oxygen sensor fault, MIL illumination, or drivability concerns tied to exhaust feedback.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon female connector for application-specific connection
• Wiring harness length: 10.35; overall length: 13.9
• Walker Products Aftermarket part number 350-34301

Detailed Description

Walker Products 350-34301 is an emission control oxygen sensor designed for downstream positions on select 2008-2013 Chevrolet Caprice and Pontiac G8 vehicles. It is listed for Downstream Left and Downstream Right locations, including Bank 1 Sensor 2 and Bank 2 Sensor 2 applications. This part number is built for the specified fitment position so the ECU receives the expected diagnostic feedback from the exhaust system.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE replacement parts for many vehicles worldwide. The 350-34301 follows that approach with a heated, threaded sensor design intended for direct replacement in the listed applications. This part number cross-references no additional part numbers in the provided data.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel control caused by inaccurate exhaust feedback
• Increased fuel consumption from a failing sensor signal
• Higher exhaust emissions from incorrect air-fuel monitoring
• Fault codes stored in the ECU for Bank 1 Sensor 2 or Bank 2 Sensor 2

Installation Notes and Tips

Confirm the vehicle’s exact downstream position before ordering: Fits 2011-2013 Chevrolet Caprice, Downstream Left or Downstream Right, and Fits 2008-2009 Pontiac G8, Downstream Left or Downstream Right. Verify connector shape, thread size, and harness routing against the original sensor before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect readings.

Quality Assurance

Walker Products is an automotive ISO 9001/TS 16949 certified company with a long history in engine management and fuel system components. The 350-34301 is manufactured for the specified application and fitment position to support proper ECU feedback in the listed vehicles.