Walker 350-35022 Oxygen Sensor - Upstream

Walker 350-35022 Oxygen Sensor Overview

Walker Products 350-35022 is a heated oxygen sensor built as a specific-fit OE replacement for select applications. It is engineered to provide the ECU with the feedback needed for fuel control and emissions monitoring, making it a direct service part for diagnosing and correcting sensor-related faults.

Compatible with 2007-2013 Mazda 3 upstream applications, this Walker Products Aftermarket oxygen sensor is positioned as Bank 1 Sensor 1 where specified. The 350-35022 is designed for threaded mounting and uses a 5-wire configuration with a 29.06-inch wiring harness and a 20-gauge wire specification.

Key Features

• Heated oxygen sensor for emissions and engine management feedback
• Specific-fit design for select Mazda 3 upstream applications
• Threaded mounting with 18.0 mm thread diameter
• 5-wire sensor layout with female/male connector configuration
• 29.06-inch wiring harness length for application-specific routing
• Radiused polygon connector shape for proper vehicle interface
• Walker Products Aftermarket part number 350-35022

Product Details

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as OE-style replacements for vehicles worldwide, with each part number matched to a specific application and sensor position. This helps ensure the ECU receives the correct diagnostic feedback for closed-loop fuel control and emissions monitoring. For 2007-2013 Mazda 3 upstream service, the 350-35022 is a direct-fit oxygen sensor solution for Bank 1 Sensor 1 and other listed front oxygen sensor applications.

The Walker Products line has been part of the company’s engine management and fuel system catalog since 1946, and the brand emphasizes application-specific fitment across its sensor range. If your Mazda 3 is showing oxygen sensor fault codes, poor fuel economy, elevated emissions, or an illuminated malfunction indicator light, this sensor is a direct replacement to address the affected upstream circuit.

Common Issues This Part Can Address

• Oxygen sensor fault codes stored in the ECU
• Rough engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from a failing upstream sensor
• Malfunction indicator light related to the oxygen sensor circuit

Installation Notes and Tips

Confirm the vehicle uses an upstream oxygen sensor location before ordering. For 2007-2013 Mazda 3 service, verify Bank 1 Sensor 1 placement and compare the connector shape, wire count, harness length, and threaded mounting style to the original part. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since physical damage can shorten sensor life and affect readings.

Use the vehicle’s ECU fault codes and sensor location information to confirm the correct replacement. The part number 350-35022 should be matched to the exact application listed for your Mazda 3.

Quality Assurance

Walker Products is an automotive ISO 9001/TS 16949 certified company focused on engine management sensors and fuel system components. The 350-35022 is built as an application-specific replacement intended to deliver the diagnostic feedback required by the vehicle’s ECU.