Walker 245-2156 Mass Air Flow Sensor

Walker Mass Air Flow Sensor for Nissan and Infiniti

Walker Mass Air Flow Sensor 245-2156 is a direct-fit engine management sensor for select Nissan and Infiniti applications. It is built to meet or exceed OEM standards and specifications, with fitment coverage for 1996-1997 Nissan Pathfinder and 1997 INFINITI QX4.

Key Features

• Mass air flow sensor for emission control and engine management systems
• Fits 1996-1997 Nissan Pathfinder and 1997 INFINITI QX4
• 3-terminal female connector
• Mounting hardware included
• Housing not included
• Walker Mass Air Flow Sensor 245-2156

Walker Mass Air Flow Sensor Line

The Walker Mass Air Flow Sensor line is part of Walker Products’ engine sensor offering, supported by in-house manufacturing, product management, and engineering resources. Walker has supplied fuel system and engine management components since 1946 and produces parts for the automotive aftermarket with attention to application accuracy and technical support. Part number 245-2156 follows that approach for Nissan Pathfinder and INFINITI QX4 service needs.

Detailed Description

This mass air flow sensor measures incoming air so the engine control system can calculate fuel delivery more accurately. For vehicles such as the 1996-1997 Nissan Pathfinder and 1997 INFINITI QX4, a properly functioning sensor helps maintain stable drivability and consistent engine response. Walker 245-2156 is a practical OE-style replacement for service work where the original sensor has failed or is no longer performing within specification. This part cross-references 105037H7 and 7450037 for the same application.

Common Issues This Part May Resolve

• Rough idle or unstable engine speed
• Hesitation during acceleration
• Reduced fuel economy from incorrect air measurement
• Check engine light related to air metering faults
• Poor throttle response on Nissan Pathfinder or INFINITI QX4 applications

Installation Notes and Tips

Verify connector style, terminal count, and mounting points before installation. Inspect the intake tract for leaks, contamination, or damaged wiring that could affect sensor readings. If the original housing is reused, confirm that the sealing surfaces are clean and undamaged. Clear diagnostic trouble codes after installation and confirm idle quality and airflow readings during a road test.

Quality Assurance

Walker Products is an ISO 9001 and IATF 16949 certified manufacturer focused on producing engine sensors and fuel system components to OEM-level standards and specifications. The brand’s engineering and technical support resources help maintain application accuracy for parts like the Walker Mass Air Flow Sensor 245-2156.