Walker 350-34409 Oxygen Sensor - Center

Walker Oxygen Sensor for Mazda MPV

Walker Products 350-34409 is a heated oxygen sensor built as a specific-fit OE replacement for select 2000-2001 Mazda MPV center applications. It is engineered to provide the ECU with the exhaust feedback needed for accurate fuel control and emissions monitoring.

Key Features

• Specific-fit oxygen sensor for the center position
• Heated sensor design for faster operating temperature
• 4-wire configuration with a female connector
• 18.0 mm thread diameter and threaded mounting type
• 10.75 in. wiring harness length and 14.29 in. overall length
• Radiused polygon connector shape for application-specific fitment

Detailed Description

Walker Products Aftermarket 350-34409 is part of the Walker Products Engine Management and Oxygen/Air-Fuel sensor line, developed as an OE-style replacement for vehicles worldwide. For 2000-2001 Mazda MPV center oxygen sensor applications, this part is built to match the required fitment position and deliver the diagnostic feedback the ECU expects. If the original sensor is aging or damaged, the vehicle may run rich or lean, use more fuel, increase exhaust emissions, or trigger the malfunction indicator light. Walker Products 350-34409 is a direct-fit solution for Mazda MPV owners looking to restore proper sensor response in the exhaust system.

What It Can Help Address

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

Installation Notes and Tips

Fits 2000-2001 Mazda MPV, center. Confirm the connector shape, wire count, thread diameter, and harness length before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect signal quality. This part number is 350-34409, and it should be matched to the exact application listed for proper ECU feedback.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates as an ISO 9001/TS 16949 certified company. The Walker Products Aftermarket line is focused on application-specific replacement parts, and 350-34409 follows that approach for Mazda MPV oxygen sensor service.