My bike was at the dealer for its service. They informed me that, as part of this service, data will be transferred to Bosch. Why is that?

The DiagnosticTool from Bosch transmits the data necessary for the handling of the service case to Bosch. Here only the data necessary for the efficient and fast processing of the service case is transmitted. This procedure applies to almost all Bosch eBike Systems products, such as the drive unit, rechargeable battery and the dealer service products, such as the CapacityTester.