Walker 245-1604 Mass Air Flow Sensor

Sensor Only Mass Air Flow Replacement

Walker 245-1604 is a sensor-only mass air flow sensor for select BMW and Mini applications. It is built as a new, tested replacement with a black housing, 4-pin female connector, and oblong connector shape for direct-fit service on supported vehicles.

For BMW 330i, BMW X3, Mini Cooper, and other listed applications, this Walker sensor-only design offers a focused repair option when the housing is still serviceable. Part number 245-1604 is engineered and production-tested to support proper airflow measurement and consistent engine management performance.

Key Features

• Sensor only replacement for emission control and engine air metering service
• 100% new, not remanufactured
• Programmed and tested for fit, form, and function before release
• Black finish with 1 connector, 4 terminals, and female pin-style connection
• Designed for select BMW and Mini models from 2017-2025
• Walker sensor-only line supports faster, more economical repairs when the housing is reusable

Product Details

Walker Products’ Sensor Only line is intended for applications where replacing the sensing element is the right service approach. The brand manufactures many high-demand MAF sensors in the USA using OEM-quality components, custom circuit boards, and application-specific calibration. This part number 245-1604 is part of that program and is verified through production testing and on-vehicle validation to help maintain OE-style fuel trim performance on the listed BMW and Mini platforms.

This part cross-references BMW 13628583496 for the same application.

What This Part Helps Address

• Rough idle caused by inaccurate airflow readings
• Check engine lights related to mass air flow sensor performance
• Hesitation or poor throttle response during acceleration
• Fuel trim issues from incorrect air metering
• Driveability concerns on BMW 230i, 330i, X3, and Mini Cooper applications

Installation Notes

Confirm the connector style, terminal count, and vehicle application before installation. Sensor-only replacement is typically used when the existing housing and air path are clean and undamaged. Handle the sensing element carefully during installation to avoid contamination from oils, dirt, or debris.

Compatible With: 2022-2025 BMW 230i; 2023-2025 BMW 230i xDrive; 2022-2025 BMW 840i; 2022-2025 BMW 840i Gran Coupe; 2022-2025 BMW 840i xDrive; 2022-2025 BMW 840i xDrive Gran Coupe; 2022-2025 BMW X4; 2023-2024 BMW 228i Gran Coupe; 2023-2024 BMW 228i xDrive Gran Coupe; 2020-2021 BMW 228i xDrive Gran Coupe; 2020-2024 BMW 330e; 2021-2024 BMW 330e xDrive; 2020-2024 BMW 330i; 2020-2024 BMW 330i xDrive; 2022-2024 BMW 430i; 2022-2024 BMW 430i Gran Coupe; 2022-2024 BMW 430i xDrive; 2023-2024 BMW 430i xDrive Gran Coupe; 2020-2024 BMW M235i xDrive Gran Coupe; 2022-2024 BMW X3; 2022-2024 Mini Cooper; 2022-2024 Mini Cooper Clubman; 2020 Mini Cooper Clubman; 2022-2024 Mini Cooper Countryman; 2021-2023 BMW 530e; 2021-2023 BMW 530e xDrive; 2022-2023 BMW 530i; 2022-2023 BMW 530i xDrive; 2022-2023 BMW 540i; 2022-2023 BMW 540i xDrive; 2023 BMW X2; 2019-2021 BMW X2; 2022-2023 BMW X5; 2022-2023 BMW X6; 2021-2022 BMW 228i Gran Coupe, Incl.Seal; 2022 BMW 228i xDrive Gran Coupe, Incl.Seal; 2022 BMW 740i; 2022 BMW 740i xDrive; 2020-2022 BMW 745e xDrive; 2022 BMW X1, Incl.Seal; 2022 BMW X2, Incl.Seal; 2022 BMW X7; 2018-2021 BMW X1; 2019-2020 BMW 220i; 2018-2020 BMW 520i, B48D Engine; 2020 BMW 745e; 2020 BMW 745Le xDrive; 2020 BMW M340i xDrive; 2018 BMW 220i, B48C Engine; 2018 BMW 540d xDrive; 2017 BMW X1, B38C Engine.

Quality Assurance

Walker Products has supplied fuel system components and engine sensors since 1946 and is an ISO 9001/IATF 16949 certified manufacturer. The 245-1604 is 100% new, programmed, and tested before sale, with calibration verified through production and vehicle testing.