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BMW TSB #SIB 61 01 21
2020 BMW M340i
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- Summary
- 48 V battery may become totally discharged, and possible replacement needed if: a) The vehicle has been charged using a 12 V charger with the hood closed during a long stationary period, the. For example, the showroom or storage. b) Vehicles stored for an extended period connected to a low output solar or trickle charger. c) Vehicles stored for an extended period with no charger connected and not properly maintained 12 V battery.
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