BMW F20 F21 F10 F11 LCI F30 F32 ACC Front Radar Sensor Module Unit 6874817

BMW F20 F21 F10 F11 LCI F30 F32 ACC Front Radar Sensor Module Unit is a factory-original component from the Electronic control modules and controllers group, designed for operation within the active cruise control and driving assistance systems. It enables precise monitoring of the situation in front of the vehicle, supporting the maintenance of a safe distance and smooth speed adjustment. This is a solution for users expecting proven, original electronics tailored to BMW architecture.

Specifications and technical data

• SKU: 6874817
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6874817
• Substitutable numbers: 6874817, 66316874817, 6885585, 66316885585, 6876327, 66316876327, 6865688, 66316865688, 6861040, 66316861040, 6869000, 66316869000, 6877096, 66316877096, 6864628, 66316864628, 6868707, 66316868707, 6861660, 66316861660, 6863153
• Location on the vehicle: Front
• Category: ECUs & Computer Modules

Purpose and function of the ACC radar module

The described module is a front radar sensor responsible for the operation of the active cruise control system in selected BMW F-series models. As a component mounted in the front area of the vehicle, it works with safety and driving comfort systems by analyzing the distance and relative speed of preceding vehicles.

In practice, this means that the controller transmits information to other vehicle systems necessary for:

• maintaining a set speed while accounting for traffic ahead,
• automatic braking and re-acceleration depending on road conditions,
• cooperation with additional assistance functions, if present in the specific vehicle configuration.

As a result, the driver receives more stable, predictable handling, and the driving assistance system can operate according to the manufacturer's factory specifications.

Integration with BMW electronics

As an original BMW component, the ACC radar module is designed for full integration with the vehicle's communication bus and other controllers. Appropriate software and hardware architecture enable correct data exchange with the engine unit, braking system, and driver assistance systems.

Proper matching by part number and interchangeable numbers allows for selecting a module compatible with the specific car configuration, which minimizes the risk of communication issues, controller memory errors, or limited functionality. This is particularly important in modern vehicles, where many safety functions rely on the simultaneous cooperation of multiple modules.

Vehicle placement and installation aspects

The module is designed for installation in the front of the vehicle, in an area that ensures an unobstructed "field of view" for the radar. Correct placement and stable mounting are crucial for measurement accuracy and the proper operation of the ACC system.

After installation, it is recommended to perform service procedures provided by the manufacturer, such as sensor calibration and verification of communication with other controllers. This allows for restoring full system functionality and avoiding incorrect readings or warning messages on the instrument cluster.

Characteristics as a used electronic module

The offered component comes from the secondary market, which represents a reasonable compromise between repair costs and maintaining the manufacturer's original specifications. A used radar module allows for restoring the operation of the factory system without the need to invest in a new part, while maintaining structural and software compatibility with the given BMW generation.

Before installation in the vehicle, it is worth planning standard service activities, such as computer diagnostics after installation, potential coding, and a road test with active cruise control. This confirms the correct cooperation of the module with the rest of the car's electronics.

Selecting the right ACC module and technical knowledge

Proper selection of the BMW F20 F21 F10 F11 LCI F30 F32 ACC Front Radar Sensor Module Unit for a specific BMW vehicle requires considering the part number, interchangeable numbers, and vehicle equipment configuration. In practice, VIN data and service documentation are often used to ensure that the controller will be hardware and software compatible.

If you want to deepen your knowledge regarding the selection and installation of used controllers and sensors, how to verify compatibility, or the most frequently asked questions related to second-hand electronics, check out our guide: Used automotive electronics – ECU modules and second-hand sensors.

Related products from the same group

If you are planning a comprehensive repair or upgrade of the driving assistance systems area in your BMW and need other components from the same group, such as controllers, comfort modules, or additional ECU units, check out the available parts in the BMW electronic control modules and controllers category.