iDrive: Head-unit, CCC, CIC, or NBT, can suffer from various issues.Another approach is installing a universal fiber optic bypass loop, which is cheaper if you don’t use the satellite radio. Although the satellite radio can be repaired, replacing it with a working used unit is much easier. Depending on the model, it is located in the trunk, either on the side or under a floor cover. Satellite Radio: A faulty satellite radio is the most common cause by far.

If there is an issue with the communication of these technologies, it can prevent the system from working. Communication Error: The SOS call system uses cellular and GPS technology to send an emergency call and the vehicle’s location.If there is an issue with the pairing between the driver’s phone and the SOS call system, it can prevent the system from working. Bluetooth Pairing Issues: The SOS call system uses Bluetooth technology to communicate with the driver’s phone.If the control module fails, it can prevent the system from functioning properly. Control Module Failure: The control module is the electronic component that manages the SOS call system.If there is an error in the programming, it can cause the system to malfunction. Programming Glitch: The SOS call system is a complex system controlled by software.On the downside, if one component fails, all other devices within the loop will be disconnected. This improves signal quality and reduces interference. What Causes BMW SOS Call System Malfunction?Īll units, such as amplifiers, SOS modules, or head-unit, are connected with an optic cable in one loop. Warning chimes might be disabled as well. In some models, the iDrive system will not respond to any commands. When the SOS call system fails, it will warn the driver with a crossed-out SOS call malfunction warning light on the dashboard.

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