2021 BMW 330i 'Replace Battery' Message TSB

Symptoms

Owners of affected 2021 BMW vehicles, including the 2021 BMW 330i manufacturer_communication, may observe a specific warning message. The primary symptom is the illumination of a red Check Control Message (CCM) on the instrument cluster. This message will explicitly state, "Replace Battery."

Diagnosis and Trigger Conditions

The root cause of the "Replace Battery" warning is identified as a software error within the power management system. This error causes the microcontroller responsible for power management to reset continuously and intermittently. This persistent resetting is what triggers the erroneous "Replace Battery" message, even if the battery itself is not faulty.

Repair Procedure Summary

To resolve the issue causing the "Replace Battery" message, BMW has issued a SERVICE ACTION. The recommended repair involves either programming or replacing the dual storage system battery. This procedure aims to correct the software error in the power management system, preventing the microcontroller from continuously resetting and eliminating the false warning message. This service action, identified by NHTSA ID 10199299, ensures the proper functioning of the vehicle's power management.

Owner Action

If you own a 2021 BMW 330i or another affected 2021 BMW model and are experiencing the "Replace Battery" message, you should contact your authorized BMW dealership. They will be able to diagnose the issue and perform the necessary programming or replacement of the dual storage system battery as part of the SERVICE ACTION. This addresses the underlying software error that triggers the 2021 BMW 330i manufacturer_communication warning.

Important Warnings

BMW has initiated this as a SERVICE ACTION. This type of action differs from a recall in that manufacturers may not directly notify all consumers. Owners are encouraged to be proactive and contact their dealership if they experience the described symptom.

Source: NHTSA ID 10199299