Walker 245-1012 Mass Air Flow Sensor

Walker Mass Air Flow Assembly for Ford and Mercury

Walker Mass Air Flow Assembly 245-1012 is a direct-fit mass air flow sensor assembly for select Ford and Mercury applications. It is built with a housing included and a 4-terminal female connector layout for a straightforward replacement on supported vehicles.

Walker Products has supplied fuel system and engine management components since 1946, with manufacturing and engineering support focused on meeting OEM standards and specifications. The Walker Mass Air Flow Assembly line is part of that broader product range, giving technicians and DIY buyers a replacement option for air metering service on older Ford and Mercury platforms.

Key Features

• Mass air flow sensor assembly for emission control and engine management service
• Housing included for a complete assembly-style replacement
• 4-terminal female connector
• Direct-fit application coverage for select Ford Aerostar, Ford Tempo, Ford Ranger, and Mercury Topaz models
• Walker part number 245-1012 for catalog and cross-reference lookup

Detailed Description

Walker 245-1012 is a mass air flow sensor assembly used to measure incoming air for the engine control system. Accurate air metering is important for fuel delivery, idle quality, and drivability, especially on vehicles where the original sensor housing and electronics are serviced as an assembly. This part cross-references Standard Ignition MAS0405 for the same application.

Compatible With 1995 Ford Aerostar, N/A; 1993-1994 Ford Aerostar, N/A; 1992-1994 Ford Tempo, N/A; 1992-1994 Mercury Topaz, N/A; 1992 Ford Aerostar, N/A; and 1992 Ford Ranger, N/A. Use the stamped OE number and connector style to confirm the correct match before installation. Walker Mass Air Flow Assembly 245-1012 is a practical replacement choice for Ford Aerostar and Ford Ranger air metering service, as well as Mercury Topaz and Ford Tempo applications.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Fuel trim issues related to incorrect air measurement
• Check engine light concerns tied to the mass air flow circuit
• Poor drivability after sensor wear or contamination

Installation Notes and Tips

Verify the OE stamping, connector configuration, and mounting style against the original unit before replacement. This assembly includes the housing, and no mounting hardware is listed. Clean intake tract components during service to reduce contamination that can affect sensor readings after installation.

Quality Assurance

Walker Products is an ISO 9001/IATF16949 certified manufacturer with in-house product management and engineering support. Its engine sensor and fuel system components are produced to meet or exceed OEM standards and specifications for the listed applications.