Walker 245-1578 Mass Air Flow Sensor

Walker Sensor Only Mass Air Flow Sensor

Walker 245-1578 is a sensor-only mass air flow sensor for select Nissan and INFINITI applications. It is built as a new, tested replacement with a 4-wire, 4-terminal design, black plastic housing, oblong 1-connector layout, and male connector interface.

Walker’s Sensor Only line is focused on replacing the sensing element without the full housing assembly when that is the correct service approach. For Nissan Altima, Maxima, Rogue, Murano, Sentra, Versa, Juke, Pathfinder, Kicks, and related applications, this format can simplify service while maintaining OE-style fit and calibration targets.

Key Features

• Part number 245-1578 mass air flow sensor
• Sensor Only replacement style with housing included
• Black plastic housing with oblong connector shape
• 4-wire, 4-terminal, male connector design
• 2 mounting holes for OE-style installation
• New, programmed, and tested before release
• Built to meet or exceed OE long-term fuel trim targets

Detailed Description

Walker 245-1578 is engineered for direct replacement service on select Nissan and INFINITI vehicles, including the Nissan Altima, Maxima, Rogue, Murano, Sentra, Versa, Juke, Pathfinder, Kicks, Kicks Play, Rogue Sport, Qashqai, X-Trail, Versa Note, and the INFINITI QX60. This mass air flow sensor is part of Walker’s Sensor Only program, which is designed for applications where replacing the sensing element is the preferred repair path. The unit is 100% new, programmed, and production-tested for fit, form, and function. Walker also uses custom-engineered circuit boards and on-vehicle verification to confirm calibration across the flow range. This part cross-references Standard Ignition MAS0457 for the same application.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or poor throttle response
• Check engine lights related to MAF sensor performance
• Fuel trim issues from incorrect air measurement
• Driveability problems on Nissan and INFINITI MAF applications

Installation Notes and Tips

Confirm connector shape, terminal count, and housing style before installation. Because this is a sensor-only replacement, inspect the air tube, connector area, and surrounding intake components for contamination or damage before fitting the new sensor. Avoid touching the sensing element with bare hands and verify the intake tract is clean to protect the new unit. Fits 2016-2018 Nissan Altima, N/A; Fits 2016-2019 Nissan Sentra, N/A; Fits 2017-2020 Nissan Rogue, N/A; Fits 2020-2024 Nissan Murano, N/A.

Quality Assurance

Walker Products has supplied fuel system components since 1946 and is an ISO 9001 / IATF 16949 certified manufacturer. The 245-1578 is manufactured as a new replacement sensor and is tested for fit, form, function, and calibration before sale. Walker’s MAF program is built around OE-quality components and production verification for consistent service on Nissan and INFINITI applications.