Walker 245-1664 Mass Air Flow Sensor

Walker 245-1664 Mass Air Flow Sensor

Walker 245-1664 is a sensor-only mass air flow sensor for late-model GM applications that need accurate airflow measurement and OE-style electronic calibration. It is a black, 1-connector unit with a male connector, 4 terminals, an oblong connector shape, and a 2-hole mounting pattern.

Built under Walker Products’ Sensor Only line, this MAF sensor is supplied as a new replacement part rather than a remanufactured unit. Walker programs and tests each sensor for fit, form, and function before release, with flow characteristics tuned to match the vehicle’s air metering requirements.

Key Features

• Sensor-only mass air flow sensor for direct replacement service
• Walker Sensor Only line for faster, more economical repairs
• 100% new, not remanufactured
• Programmed and tested for fit, form, and function
• Black housing color with oblong 1-connector design
• Male connector, 4 terminals, 2 mounting holes
• OEM-quality components and custom engineered circuit boards

Product Details

Walker 245-1664 is designed for vehicles that rely on precise airflow data to manage fuel delivery and engine performance. It is a strong match for drivers searching for a 2020-2024 Chevrolet Silverado 1500 mass air flow sensor, a 2021-2024 GMC Yukon MAF sensor, or a 2020-2024 Cadillac CT5 airflow sensor replacement. This part number, 245-1664, also applies across a wide range of Chevrolet, GMC, Buick, and Cadillac models listed below.

The Sensor Only format is useful when the existing housing is serviceable and the repair calls for replacing the sensing element alone. Walker notes that some manufacturers recommend replacing the complete housing assembly when contamination or connector tube condition is a concern; this sensor-only version is intended for applications where the original housing remains in good condition.

Used For These Issues

• Rough idle caused by inaccurate airflow readings
• Check engine light related to mass air flow sensor performance
• Hesitation or poor throttle response during acceleration
• Fuel trim concerns from incorrect air metering data
• Driveability problems tied to a failing MAF sensor

Installation Notes and Tips

Before installation, verify connector style, terminal count, and mounting pattern against the original part. Handle the sensing element carefully and avoid touching it with bare hands. Clean the air tube and connector area before assembly, and confirm the intake system is free of contamination that could affect the new sensor.

Compatible with select 2019-2024 Chevrolet Silverado 1500, 2021-2024 GMC Yukon, 2020-2024 Cadillac Escalade, and other listed Buick, Chevrolet, Cadillac, and GMC applications. Use the vehicle-specific fitment list to confirm exact year and model coverage for your application.

Quality Assurance

Walker Products has supplied fuel system components since 1946 and is an ISO 9001 / IATF 16949 certified manufacturer. The company states that many of its high-demand MAF sensors are built in the USA using OEM-quality components, custom circuit boards, and production testing verified with on-vehicle validation.