BMW F30 F31 F32 F34 Lane Change Wrning Sensor Module Slave HC-2 Left 6856284

The BMW F30 F31 F32 F34 Lane Change Warning Sensor Module Slave HC-2 Left is an original module from the Electronic Control Modules and Controllers group, designed to operate within the lane change assist system in select BMW F-series models. It is the component responsible for precise monitoring of the vehicle's left-hand side zone, thereby enhancing the safety of overtaking and lane change maneuvers.

Specifications and technical data

• SKU: 6856284
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6885936
• Substitutable numbers: 6885936, 66326885936, 6871224, 66326871224, 6873348, 66326873348, 6857454, 66326857454, 6869514, 66326869514, 6865818, 66326865818, 6863332, 66326863332, 6864800, 66326864800, 6858472, 66326858472, 6868628, 66326868628, 6873344, 66326873344, 6881633
• Location on the vehicle: Left
• Category: ECUs & Computer Modules

Module Purpose and Function

The presented lane change warning sensor module is designed to work with the factory-installed driver assistance system in BMW F-series vehicles. As a Slave HC-2 type component, it is responsible for managing the left side of the vehicle, collaborating with other electronic system components. A properly functioning module allows for early detection of vehicles in the blind spot and generates warning signals for the driver.

Its placement on the left side ensures dedicated monitoring of this zone, which is crucial for the correct operation of the entire lane change warning system. This allows the system to react to road situations in a predictable manner, consistent with the manufacturer's design.

Compatibility and OEM Identification

The module belongs to the group of original BMW components, which facilitates its identification and selection for a specific vehicle configuration. The part has a dedicated OEM number and a set of interchangeable numbers, allowing for precise matching to a particular car model, including using service catalogs or VIN-based selection.

The presence of reference numbers enables verification of hardware and software compatibility with the existing installation in the car. This is particularly important for modules in the Electronic Control Modules and Controllers category, where version differences can affect communication on the vehicle's bus.

Installation Characteristics and Vehicle Integration

The module is intended for installation on the left side of the vehicle, in accordance with the factory location specified by the manufacturer. Thanks to its OEM design, it integrates with the existing wiring harness and the driver assistance system architecture, without requiring modifications to the installation beyond standard servicing procedures.

As a used component, the module offers a cost-effective solution while maintaining the original technical specifications. This allows for the restoration of full lane change warning system functionality without the need to purchase a new unit, while ensuring compliance with factory parameters.

Practical Application and Benefits of Installation

The application of this module is particularly important in vehicles experiencing malfunctions in the lane change assist system, such as lack of warnings, errors in the control unit memory, or system unavailability messages. Replacing it with a functional unit allows for:

• restoring correct blind spot monitoring on the left side,
• maintaining consistent operation of driver assistance systems,
• preserving the factory level of safety during lane change maneuvers.

This provides the driver with predictable, manufacturer-intended electronic support, leading to more comfortable and aware driving.

BMW Electronic Control Modules – Expansion and Service

If you are planning a comprehensive repair or upgrade of the driver assistance systems in your BMW and require other components from the same group, such as radar controllers, lane assist modules, or blind spot control units, check the available parts in the BMW Electronic Control Modules and Controllers category.

When selecting used ECU modules and sensors, the Global Parts guide will be helpful – it details selection by VIN and OEM numbers, hardware and software compatibility issues, and practical installation aspects. More information can be found in the article “Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?”.