Walker 350-34414 Oxygen Sensor

Walker Oxygen Sensor for Ford and Lincoln

Walker Products 350-34414 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for the listed Ford, Lincoln, Mazda, Mercury, and Aston Martin applications. It is built for downstream and other position-specific locations where accurate ECU feedback is required to help maintain proper fuel control and emissions performance.

Key Features

• Heated oxygen sensor design for faster operating temperature
• Specific-fit application for direct vehicle placement
• 4-wire configuration with male connector
• Threaded mounting with 18.0 mm thread diameter
• 13.31 in. wiring harness length and 16.85 in. overall length
• Radiused polygon connector shape for application-specific fitment
• Walker Products Aftermarket part number 350-34414

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for original-equipment replacement needs. Part number 350-34414 is manufactured for specific vehicle applications and sensor positions, including downstream right, downstream left, downstream front, downstream rear, upstream, and center locations where listed. This sensor is used on many Ford E-350 Super Duty, Ford F-150, and Ford Explorer applications, along with other covered models such as Lincoln MKS and Mazda CX-9. If your vehicle has a fault code related to the oxygen sensor circuit, poor fuel economy, rough running, or elevated emissions, this replacement sensor addresses the affected feedback point for the ECU.

This part cross-references Walker Products Aftermarket 350-34414 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback to the ECU
• Reduced fuel economy from a failing sensor signal
• Rough engine operation caused by inaccurate exhaust readings
• Elevated exhaust emissions from a worn sensor

Installation Notes and Tips

Confirm the exact year, make, model, and sensor position before ordering. This part is listed for specific downstream and upstream locations, so bank and sensor number matter. Inspect the wiring harness and connector for heat damage, corrosion, or physical wear before installation. Use the threaded mounting point and verify the connector orientation matches the vehicle harness. For fitment-based searches, this includes applications such as Fits 2006-2016 Ford E-350 Super Duty, downstream right; Fits 2006-2014 Ford E-150, downstream left; and Fits 2009-2014 Lincoln MKS, downstream front.

Quality Assurance

Walker Products has supplied engine management components since 1946 and manufactures this sensor under Automotive ISO9001/TS 16949 quality systems. The 350-34414 is built as an OE replacement for the listed applications and positions.