Walker 245-1132 Mass Air Flow Sensor

Walker Mass Air Flow Assembly for Nissan and INFINITI

Walker Mass Air Flow Assembly Part Number 245-1132 is a direct-fit mass air flow sensor assembly for select Nissan Pathfinder and INFINITI QX4 applications. It is built with a housing included and a 4-terminal female connector for a straightforward replacement on the listed vehicles.

Key Features

• Mass air flow sensor assembly for emission control and engine management applications
• Housing included for a complete assembly-style replacement
• 4-terminal female connector
• Fits 2001-2003 INFINITI QX4 and 2001-2002, 2004 Nissan Pathfinder
• Walker Part Number 245-1132

Walker Mass Air Flow Assembly Line

The Walker Mass Air Flow Assembly line is part of Walker Products’ engine sensor offering. Walker has supplied fuel system and engine management components since 1946 and supports its product development with manufacturing, engineering, and technical documentation resources. The company states that its products are built to meet or exceed OEM standards and specifications, with ISO 9001/IATF16949 certified quality systems.

Detailed Description

This Walker mass air flow sensor assembly measures incoming air so the engine control system can calculate fuel delivery more accurately. For drivers searching for a 2001-2003 INFINITI QX4 mass air flow sensor or a 2001-2004 Nissan Pathfinder MAF assembly, Part Number 245-1132 provides a direct replacement option for the listed fitments. This part cross-references Standard Ignition MAS0175 for the same application.

Common Issues This Part Can Address

• Check engine light related to mass air flow sensor performance
• Rough idle or unstable engine operation
• Hesitation during acceleration
• Poor fuel metering caused by inaccurate airflow readings
• Driveability concerns tied to a failing MAF assembly

Installation Notes and Tips

Verify connector style, terminal count, and housing configuration before installation. Confirm the vehicle application against the listed fitment for 2001-2002 Nissan Pathfinder, 2004 Nissan Pathfinder, and 2001-2003 INFINITI QX4. Inspect the intake tract for leaks, contamination, or damaged wiring before installing the new sensor assembly.

Quality Assurance

Walker Products states that its engine sensors are manufactured to meet or exceed OEM standards and specifications. The company also notes ISO 9001/IATF16949 certification and in-house engineering support for product accuracy and application coverage.