Walker 350-34606 Oxygen Sensor - Downstream or Upstream

Walker 350-34606 Oxygen Sensor Overview

Walker Products 350-34606 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Toyota Matrix, Toyota Corolla, and Pontiac Vibe applications. It is engineered to provide the ECU with the exhaust feedback needed for accurate fuel control and emissions monitoring.

Walker Products Aftermarket focuses on application-specific engine management sensors, and this part number is matched to the required mounting position and connector style for the listed vehicles.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• Specific fit design for the correct application and mounting position
• 4-wire configuration with 20-gauge wiring
• 18.0 mm thread diameter and threaded mounting type
• Radiused polygon connector shape with male connector gender
• Wiring harness length: 18.82 in.; overall length: 22.36 in.
• Fits downstream and upstream positions on select 2003-2008 Toyota Matrix, Toyota Corolla, and Pontiac Vibe models

Detailed Description

The Walker Products 350-34606 oxygen sensor is designed for vehicles that rely on precise exhaust-gas feedback to manage air-fuel ratio and emissions performance. As a heated sensor, it reaches operating temperature quickly, helping the ECU maintain accurate control during warm-up and normal driving. This part number is built for specific fitment, making it a direct replacement for the listed upstream and downstream applications on 2003-2008 Toyota Matrix, 2003-2008 Toyota Corolla, and 2003-2008 Pontiac Vibe models. If you are replacing a failed sensor on a Toyota Matrix downstream bank 1 sensor 2 application or a Pontiac Vibe upstream oxygen sensor, Walker 350-34606 is matched to those vehicle-specific requirements.

Walker Products Aftermarket develops engine management and oxygen/air-fuel sensors as OE replacement parts for a wide range of vehicles. Part number 350-34606 is intended to restore proper diagnostic feedback to the ECU when the original sensor is worn, contaminated, or electrically damaged. This part cross-references Walker Products 350-34606 for the same application.

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
• Higher exhaust emissions from a degraded sensor signal
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

• Confirm the vehicle year, make, model, and sensor position before ordering.
• Verify whether the application is upstream or downstream, since both positions are listed for this part number.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Check the exhaust bung threads and sensor mounting area for damage before threading in the replacement sensor.
• Use the listed connector shape, wire count, and thread diameter to confirm proper fitment on the vehicle.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company with a long history in engine management and fuel system components. The 350-34606 oxygen sensor is manufactured for the specified application and position to support the diagnostic feedback expected by the ECU.