Walker 245-1138 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-1138

Walker Mass Air Flow Sensor 245-1138 is a direct-fit engine management replacement for select Subaru, Mazda, Saab, and Jaguar applications. It is built for vehicles that need accurate airflow signal input to support proper fuel delivery and drivability.

Key Features

• Mass air flow sensor for emission control and engine management systems
• 5-terminal design with female connector
• Mounting hardware included
• Housing not included
• Walker part number 245-1138

Product Details

Walker Products has supplied fuel system and engine sensor components since 1946, with manufacturing and engineering processes focused on meeting or exceeding OEM standards and specifications. The Walker Mass Air Flow Sensor line is built to support accurate vehicle applications and dependable replacement service. Part number 245-1138 is used across a broad range of import applications, including Subaru Legacy, Outback, Forester, Impreza, Baja, Tribeca, B9 Tribeca, Mazda 3, CX-7, CX-9, 6, Saab 9-2X, and Jaguar XJ8, XK8, and Vanden Plas.

This part cross-references Delphi AF10136 and Standard Ignition MAS0265 for the same application.

Common Symptoms This Part May Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Check engine light related to air metering or fuel trim faults
• Poor fuel economy from incorrect air-fuel calculation
• Hard starting or inconsistent throttle response

Installation Notes

Verify connector style, terminal count, and vehicle application before installation. This sensor uses a female connector and 5 terminals, and the housing is not included. Confirm the existing intake assembly and mounting points match the replacement part before service. For fitment-specific searches, this part is commonly selected for a Subaru Legacy mass air flow sensor replacement, Mazda 3 mass air flow sensor replacement, or Subaru Forester MAF sensor replacement.

Quality Assurance

Walker Products is an ISO 9001 and IATF 16949 certified manufacturer with in-house engineering and product management support. The company states its engine sensors are produced to meet or exceed OEM standards and specifications, with technical support available for application accuracy.