2021-2023 BMW Battery Discharge & No-Start Condition TSB

Owners of various 2021-2023 BMW models may encounter a frustrating issue where their vehicle's 12-volt battery becomes discharged, potentially leading to a no-start condition. This problem stems from a software error that sporadically prevents the vehicle from properly entering sleep mode.

When the vehicle fails to achieve sleep mode, electrical systems remain active, continuously drawing power from the 12-volt battery. Over time, this parasitic drain can completely deplete the battery, leaving the vehicle unable to start.

Symptoms

Owners may notice the following symptoms related to the BMW battery discharge issue:

• The vehicle's 12-volt battery is frequently discharged.
• A no-start condition, where the vehicle fails to turn on.
• The vehicle sporadically does not achieve sleep mode after being turned off.

Diagnosis and Trigger Conditions

The root cause of the BMW battery discharge is a software error. This error interferes with the vehicle's ability to transition into a low-power sleep state when parked. As a result, components that should power down remain active, leading to excessive battery drain.

Repair Procedure Summary

To resolve the BMW battery discharge and no-start condition, a software update is required. This update will correct the error that prevents the vehicle from entering sleep mode, ensuring proper power management and preventing future battery drain.

Owner Action

If you are experiencing a discharged 12-volt battery or a no-start condition with your 2021-2023 BMW, it is recommended to contact your authorized BMW dealer. They can perform the necessary software update to address this issue. This repair is typically covered under warranty.