Walker 245-1158 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-1158

Walker Mass Air Flow Sensor 245-1158 is a direct-fit engine management replacement for select Ford applications. It is built with a 4-terminal female connector and includes mounting hardware, making it a practical choice for restoring accurate airflow signal input on supported vehicles.

Compatible With 2001-2004 Ford F-150, 2004 Ford F-150 Heritage, 2001 Ford F-250, and 2003-2004 Ford Mustang applications, this Walker MAF sensor supports OE-style service needs for common drivability concerns tied to airflow measurement. Part number 245-1158 is also cross-referenced to Standard Ignition MAS0132 for the same application.

Key Features

• Walker Mass Air Flow Sensor for emission control and engine management service
• Part number 245-1158 for accurate catalog matching
• 4-terminal female connector
• Mounting hardware included
• Housing not included
• Built by Walker Products, a long-standing manufacturer of fuel system and engine sensor components
• Manufactured to meet or exceed OEM standards and specifications

Product Details

Walker Products has supplied fuel system and engine sensor components since 1946, with manufacturing and engineering support focused on accurate part application and OE-level service requirements. The Walker Mass Air Flow Sensor line is part of that engine management offering, and this 245-1158 sensor is intended for vehicles that rely on precise airflow measurement for fuel delivery and drivability control. Use part number 245-1158 when sourcing a replacement for 2001-2004 Ford F-150, 2004 Ford F-150 Heritage, 2001 Ford F-250, or 2003-2004 Ford Mustang applications.

Common Issues It May Address

• Rough idle caused by inaccurate airflow signal input
• Hesitation or stumble during acceleration
• Hard starting related to incorrect air metering
• Reduced fuel economy from improper fuel trim control
• Check engine light conditions tied to mass air flow sensor faults

Installation Notes

Verify connector style, terminal count, and vehicle application before installation. Inspect the intake tract, air filter housing, and wiring connector for contamination or damage before replacing the sensor. Because housing is not included, reuse the existing housing where applicable and confirm a secure seal at the mounting point. After installation, clear diagnostic trouble codes and confirm idle quality and throttle response.

Quality Assurance

Walker Products is ISO 9001 and IATF 16949 certified and supports its engine sensor products with in-house manufacturing, product management, engineering, application data, instruction sheets, and technical support. This part number 245-1158 is produced to align with OEM standards and specifications for the listed Ford applications.