2021 BMW Dual Storage System Software Error TSB

Symptoms of the Dual Storage System Software Error

Owners of affected 2021 BMW vehicles, including the 2021 BMW 330i, may experience issues related to the 12V battery's dual storage system (DSS). The primary symptom is an intermittent software error that causes continuous resetting of the microcontroller. This can lead to communication failures within the vehicle's electrical system.

These intermittent issues might manifest as unexpected electrical glitches or warnings, though the specific dashboard messages are not detailed in the communication. The underlying cause is the software anomaly affecting the dual storage system's operation.

Diagnosis and Trigger Conditions

The manufacturer communication indicates that the 12V battery's dual storage system (DSS) may contain a software error. This error intermittently triggers a continuous resetting of the microcontroller. This resetting action then leads to communication failures within the system.

Technicians will need to diagnose the dual storage system to confirm the presence of this software fault. The intermittent nature suggests that the issue might not be constantly present, requiring specific diagnostic procedures to identify the underlying software problem.

Repair Procedure Summary

To address the software error in the 12V battery's dual storage system (DSS), BMW has outlined a specific repair procedure. The primary action involves programming the dual storage system. This step aims to correct the software anomaly that causes the intermittent microcontroller resetting and communication failures.

If programming alone does not resolve the issue, or if the system is found to be faulty beyond software correction, replacement of the dual storage system may be necessary. This ensures the proper functioning of the 2021 BMW 330i dual storage system and prevents recurrence of the communication problems.

What Owners Should Do

If you own a 2021 BMW model, such as the 2021 BMW 330i, and suspect issues with your vehicle's electrical system or experience intermittent communication failures, it is advisable to contact your authorized BMW dealer. Inform them of any symptoms you are experiencing.

Reference NHTSA Manufacturer Communication 10190859 when discussing the issue with your service advisor. They will be able to perform the necessary diagnostics and apply the programming update or replace the dual storage system as required.

Source: NHTSA ID: 10190859