Bosch Motor Failure Due to Loose Electrical Connections

Confirm this cause by physically inspecting all accessible electrical interfaces. Check that the battery is fully seated and locked in its mount. Inspect the metal contact pins on the battery and the bike frame for signs of debris, oxidation, or corrosion. Verify that all cables connected to the display and the remote controller are firmly seated in their ports and that there is no visible damage or pinching of the wiring harness.