BMW 1 3 5 Series 1 F10 F20 F21 F30 F31 Hot Film Air Mass Meter Sensor 7602038

The BMW hot film air mass meter (HFM) is a precision sensor designed for select 1, 3, and 5 Series models, including the F10, F20, F21, F30, and F31 generations. The component comes from a low-mileage car, which translates into stable operating parameters and a good basis for further use in the engine intake system.

Specifications and technical data

• SKU: 7602038-1
• Mark: BMW
• Condition: Used
• OEM Part Number: 7602038
• Substitutable numbers: 13627602038, 7602038, 0280218266, 0 280 218 266, EM

Application and function in the intake system

The BMW mass air flow sensor is responsible for accurately measuring the amount of air drawn in by the engine, which is crucial for the engine control unit to properly meter fuel. In 1, 3, and 5 Series F generation vehicles, a properly functioning MAF sensor affects:

• stable idling and smooth acceleration,
• correct response to gas in the full speed range,
• maintaining the optimal fuel-air mixture,
• reducing excessive fuel consumption and exhaust emissions.

The hot film technology used in this sensor ensures a quick response to flow changes, which is particularly important in modern BMW power units.

Construction, condition and origin

This component is part of the original BMW intake system, designed to work with the factory engine control unit. The hot film design utilizes a thin-film measuring element that allows for precise airflow mapping in real time.

The sensor is in used condition, meaning it shows signs of normal wear and tear but remains functional enough for continued use after proper installation. The donor's low mileage (95) suggests limited wear and tear compared to components from high-mileage vehicles.

Vehicle compatibility and integration

The air flow sensor is designed to work with select BMW 1, 3, and 5 Series F-generation engines, where it serves as a key sensor in the engine control loop. Its factory-installed design ensures:

• correct fit to the serial wiring harness,
• compliance with the injection maps stored in the engine control unit,
• stable communication with the vehicle diagnostic system,
• possibility of direct replacement of a damaged element without modifying the installation.

The presence of the OEM part number and interchangeable numbers (visible in the technical specifications) facilitates verification of compatibility with a specific engine version and car year.

Benefits of installing a used OEM flow meter

Choosing a used, original BMW air flow meter is both economically and technically advantageous. Compared to cheap, low-quality alternatives, an OEM part provides:

• consistency of measurement parameters with the manufacturer's factory assumptions,
• lower risk of engine controller errors and emergency mode,
• better repeatability of readings in the long term of operation,
• maintaining the operating characteristics of the drive unit close to the factory state.

For those planning mechanical or software modifications, a properly functioning airflow meter is the foundation for further tuning. In such cases, it's worth reviewing our guide on how to safely increase engine power with used parts to better plan the next stages of the upgrade.

Practical installation and operating tips

When replacing the air flow meter in a BMW F series, it is recommended to:

• thorough cleaning of the intake pipe before installing the new sensor,
• checking the condition of the air filter and replacing it if necessary,
• checking the tightness of the intake system after installation,
• adapting or clearing errors in the engine control unit using the appropriate diagnostic interface.

This approach allows you to fully utilize the potential of the offered flow meter and reduce the risk of recurring engine problems.

Summary

The BMW Hot Film Air Mass Meter Sensor for the 1, 3, and 5 Series (F10, F20, F21, F30, F31) is a used, original intake system component that provides a reliable solution for replacing a damaged MAF sensor. Thanks to its factory design, matching the engine control unit, and being sourced from a low-mileage car, this product is a technically sound choice for users who value proper engine performance and predictable vehicle behavior.