BMW X3 F25 X4 F26 Blind Spot Lane Change Module Radar Sensor Left N/S 6873289

BMW X3 F25 X4 F26 Blind Spot Lane Change Module Radar Sensor Left N/S is a specialized component from the Electronic control modules and controllers group, responsible for precise monitoring of the traffic situation in the adjacent lane on the left side of the vehicle. The original BMW design ensures consistency with the vehicle's factory electronic architecture and stable cooperation with driver assistance systems, which translates into predictable operation of the lane change assist system.

Specifications and technical data

• SKU: 6873289
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6873289
• Substitutable numbers: 66326873289, 6873289, 66326873351, 6873351, 66326872645, 6872645, 66326870377, 6870377, 66326865883, 6865883, 66326867157, 6867157
• Location on the vehicle: Left
• Part type: ADAS Control Module
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented module is designed for BMW X3 F25 and BMW X4 F26 models, where it acts as a radar sensor responsible for monitoring the zone on the left side of the vehicle. As an element of the lane change system, it analyzes the surroundings in real time, supporting the driver in assessing the distance and presence of other vehicles in the blind spot. Thanks to integration with the onboard electronics, the module works with the appropriate body controllers, creating a coherent driving safety support system.

Integration with BMW electronics

The module belongs to the Electronic control modules and controllers group, which means it has been designed to work within the vehicle's communication bus and to cooperate with factory BMW software. Proper configuration allows for:

• correct data exchange with other assistance system controllers,
• stable operation of the lane monitoring function,
• maintaining compliance with factory safety parameters. Placement on the left side ensures coverage of the critical area in the rear corner of the vehicle, which is crucial during overtaking maneuvers and lane changes.

Vehicle placement and installation aspects

The component is intended for installation on the left side of the vehicle, in accordance with the factory design of the BMW radar system. Such placement allows for optimal alignment of the radar beam relative to the body geometry and ensures correct cooperation with the right-hand module (if present in the given configuration). Proper seating and calibration of the module are essential for maintaining measurement accuracy and the correct operation of the warning signals in the cabin.

Product characteristics and practical application

As a used part, the module is an attractive solution for users looking for factory BMW electronics at a reasonable price, while maintaining the original specification. Using an original radar module allows for maintaining the consistency of the driving assistance system, which is particularly important in vehicles equipped with advanced safety systems. Due to its classification as an electronic controller, the module can be matched to the specific equipment configuration of the vehicle, taking into account the appropriate part numbers and interchangeable numbers available in the technical specification.

Selection of a used module and technical knowledge

When selecting a used lane change module, it is important to pay attention to compatibility with the model version, production year, and equipment configuration. Proper matching is facilitated by the manufacturer's markings and interchangeable numbers, which allow for selecting a component that meets the factory requirements of a given BMW unit. To better understand the specifics of selecting used automotive electronics, it is worth checking the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses the practical aspects of selecting and verifying these types of components. If you are planning a comprehensive repair or upgrade of the driver assistance systems area in your BMW and need other components from the same group, such as additional controllers, radar modules, or sensors cooperating with driving assistants, check the available parts in the BMW electronic control modules and controllers category.