peter at ebike motor center did service them but then had to replace every single one they opened and cost them a lot of money because the sensors detected it was opened after a firmware update.
bosch can bus lock there bms like most others if power is lost or left with no charge for months drains the cell bank to 0v.
its called renewable technology you throw it in the bin and buy a new one for 20k
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post a link over there as might help some poor sucker m8 has a bike with a shitmano motor and cant even buy a new one for 1k warranty replacements only
