Walker 245-1178 Mass Air Flow Sensor

Walker Mass Air Flow Sensor for Toyota and Lexus

Walker Mass Air Flow Sensor 245-1178 is a direct-fit engine management sensor for select Toyota and Lexus applications. It is built to meet or exceed OEM standards and specifications, with a 5-terminal female connector and mounting hardware included for a cleaner replacement job.

Compatible With Toyota Tacoma, Toyota Tundra, Toyota Corolla, Toyota Prius, Toyota Sequoia, Toyota 4Runner, Lexus GX460, and other listed applications, this sensor supports accurate airflow measurement for proper fuel delivery and drivability. Part number 245-1178 is also cross-referenced to Delphi AF10205 for the same application.

Key Features

• Walker Mass Air Flow Sensor line for engine management replacement
• 5-terminal female connector
• Mounting hardware included
• Sensor-only design for listed applications
• Built by an ISO 9001/IATF16949 certified manufacturer
• Part number 245-1178

Product Details

Walker Products has supplied fuel system and engine sensor components since 1946, with manufacturing and engineering support focused on accurate vehicle applications and technical documentation. The Walker Mass Air Flow Sensor line is positioned for OE-style replacement across a wide range of Toyota and Lexus models, including 2005-2020 Toyota Tacoma, 2005-2020 Toyota Tundra, 2010-2020 Lexus GX460, 2013-2020 Lexus LX570, and 2016-2020 Toyota Prius. The 245-1178 mass air flow sensor is also listed for newer sensor-only applications such as 2021-2023 Toyota Tacoma and 2021-2023 Lexus GX460.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or poor throttle response
• Fuel trim issues related to incorrect air measurement
• Check engine light concerns tied to MAF sensor performance
• Driveability problems on Toyota and Lexus engine management systems

Installation Notes and Tips

Verify connector style, terminal count, and application notes before installation. This unit uses a female connector and includes mounting hardware. For best results, inspect the intake tract, air filter housing, and wiring connector for contamination or damage before replacing the sensor. Confirm the exact vehicle listing for your year, make, and model, especially on Toyota Tacoma, Toyota Tundra, Toyota Corolla, Toyota Prius, and Lexus GX460 applications.

Quality Assurance

Walker Products manufactures engine sensors and fuel system components to meet or exceed OEM standards and specifications. The company supports production with in-house manufacturing, product management, and engineering resources, and operates under ISO 9001/IATF16949 certification.