Walker 350-64048 Oxygen Sensor - Upstream

Walker 350-64048 Oxygen Sensor for Mazda 2

Walker Products 350-64048 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for the upstream position. It is built for 2011-2017 Mazda 2 applications and is designed to deliver the ECU feedback needed for proper fuel control and emissions monitoring.

Key Features

• Specific-fit oxygen sensor for the upstream location
• Heated sensor design for faster operating response
• 4-wire configuration with female connector
• 18.0 mm thread diameter and threaded mounting type
• Wiring harness length: 21.18 in.; overall length: 24.72 in.
• Walker Products Aftermarket part number 350-64048

Application Details

Compatible with 2011-2017 Mazda 2 upstream oxygen sensor applications, including Bank 1 Sensor 1 service needs. This Walker Products Aftermarket oxygen sensor is also referenced by part number 350-64048 for front oxygen sensor replacement on supported Mazda 2 configurations.

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as original-equipment replacement parts for a wide range of vehicles. The brand focuses on application-specific fitment, so the sensor, connector style, and harness length are matched to the intended vehicle position. For Mazda 2 owners searching for an upstream oxygen sensor, 350-64048 provides the correct threaded, heated, 4-wire layout for the listed fitment.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect air-fuel feedback
• Higher fuel consumption from inaccurate exhaust readings
• Increased exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Before replacement, inspect the sensor wiring harness and connector for damage, since physical wear can shorten service life and affect signal quality. Confirm the upstream mounting location, thread diameter, and connector shape match the vehicle before installation. For 2011-2017 Mazda 2 service, verify the ECU fault code and sensor position so the correct Bank 1 Sensor 1 component is replaced.

Quality Assurance

Walker Products has manufactured engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-64048 oxygen sensor is built to support the diagnostic feedback expected by the vehicle ECU for the listed application.