Walker 245-1677 Mass Air Flow Sensor

Sensor-only MAF replacement

Walker 245-1677 is a specific-fit mass air flow sensor for Ford Super Duty applications. It is a standard replacement sensor-only unit with a bolt-on design, built for direct service where the housing is already being retained.

Key features

• Sensor-only mass air flow sensor for targeted replacement
• Standard replacement design with specific fitment
• Black plastic housing with an oblong connector shape
• 4-pin electrical connection with female connector and male terminals
• Housing included and gasket or seal included
• Walker 245-1677 is 100% new and not remanufactured

Product details

Walker Sensor Only 245-1677 is engineered as a replacement mass air flow sensor for 2023-2025 Ford F-250 Super Duty, 2023-2025 Ford F-350 Super Duty, 2023-2025 Ford F-450 Super Duty, and 2023-2025 Ford F-550 Super Duty applications. The sensor is programmed and tested for fit, form, and function, and Walker states that its MAF calibration is verified through production testing and on-vehicle validation. This part number, 245-1677, is part of Walker’s sensor-only program for buyers who need a direct service replacement rather than a complete housing assembly.

Walker’s MAF line is built around custom-tuned flow characteristics and OE-style fuel trim performance. For Ford F-250 Super Duty, Ford F-350 Super Duty, and related Super Duty models, that focus helps maintain proper airflow measurement for engine management and drivability. This part cross-references PC3Z12B579A for the same application.

What it is used for

• Replacing a failed or inaccurate mass air flow sensor
• Restoring airflow signal quality for engine control
• Addressing drivability issues tied to incorrect air measurement
• Correcting fuel trim problems caused by sensor degradation
• Servicing a sensor-only application without changing the full assembly

Installation notes and quality assurance

Confirm the connector style, mounting type, and specific-fit application before installation. The sensor uses a bolt-on mounting design with a 4-pin connection, so the existing harness and mounting points must match the vehicle configuration. Handle the sensing element carefully during installation to avoid contamination.

Walker Products manufactures this part as a new, tested replacement and supports it with ISO 9001 and IATF 16949 certified production practices. Part number 245-1677 is verified for fit, form, and function before release.