A method for replacing a drive unit of a vehicle, in particular of an electric bicycle, includes (i) capturing identification features of a first drive unit of a vehicle by way of a first service device, wherein the identification features uniquely represent the first drive unit, (ii) transmitting the identification features from the first service device to a second service device, (iii) generating configuration data by way of the second service device on the basis of the identification characteristics, (iv) transmitting the configuration data from the second service device to the first service device, (v) providing a second drive unit at the first service device, and (vi) configuring the second drive unit by way of the first service device using the configuration data.

Provided herein is an auxiliary hybrid system (AHS) that may be configured to provide electrical propulsion to an e.g., internal combustion-powered vehicle through the use of a battery and electric motor. Alternatively, the AHS may be configured to increase range to electric vehicles through the use of an internal combustion-powered generator. In either embodiment, the AHS is added to a vehicle without altering the operation of the vehicles' standard drivetrain, allowing the vehicle to operate conventionally when the AHS is not engaged. The AHS is compatible with a wide range of vehicles with a minimum of vehicle-specific parts.