Method for determining a component behaviour of at least one vehicle component (12a, 12b, 12c) of a motor vehicle, comprising the following steps: - recording a first-time start-up of the at least one vehicle component (12a, 12b, 12c) of the motor vehicle (step S1); - after recording the first-time start-up of the respective vehicle component (12a, 12b, 12c): creating in-vehicle an assigned component-identifier, wherein the component-identifier comprises a sequence of a predetermined number of characters, wherein each character is generated by means of a random generator (step S2) as well as in a further method step creating in-vehicle a motor vehicle-identifier assigned to the motor vehicle, wherein the motor vehicle-identifier comprises a sequence of a predetermined number of characters, wherein each character is generated by means of a random generator; - collecting in-vehicle operational data of the respective vehicle component (12a, 12b, 12c) and assigning the operational data to the component-identifier assigned to the respective vehicle component (12a, 12b, 12c) (step S3) - assigning the collected operational data of each vehicle component (12a, 12b, 12c) of the motor vehicle to the motor vehicle-identifier; and - determining the component behaviour of the respective vehicle component (12a, 12b, 12c) based on the operational data assigned to the respective component-identifier (step S4) and furthermore based on the operational data assigned to the respective motor vehicle-identifier, on the part of an evaluation device external to the vehicle, - wherein when sending the collected operational data of the respective vehicle component (12a, 12b, 12c) together with a specific identifier of the respective vehicle component (12a, 12b, 12c) to the evaluation device external to the vehicle, the component-identifier assigned to the respective vehicle component (12a, 12b, 12c) is used exclusively as the specific identifier, as well as the motor vehicle-identifier assigned to the motor vehicle. - recording a first-time start-up of the at least one vehicle component (12a, 12b, 12c) of the motor vehicle (step S1); - after recording the first-time start-up of the respective vehicle component (12a, 12b, 12c): creating in-vehicle an assigned component-identifier, wherein the component-identifier comprises a sequence of a predetermined number of characters, wherein each character is generated by means of a random generator (step S2) as well as in a further method step creating in-vehicle a motor vehicle-identifier assigned to the motor vehicle, wherein the motor vehicle-identifier comprises a sequence of a predetermined number of characters, wherein each character is generated by means of a random generator; - collecting in-vehicle operational data of the respective vehicle component (12a, 12b, 12c) and assigning the operational data to the component-identifier assigned to the respective vehicle component (12a, 12b, 12c) (step S3) - assigning the collected operational data of each vehicle component (12a, 12b, 12c) of the motor vehicle to the motor vehicle-identifier; and - determining the component behaviour of the respective vehicle component (12a, 12b, 12c) based on the operational data assigned to the respective component-identifier (step S4) and furthermore based on the operational data assigned to the respective motor vehicle-identifier, on the part of an evaluation device external to the vehicle, - wherein when sending the collected operational data of the respective vehicle component (12a, 12b, 12c) together with a specific identifier of the respective vehicle component (12a, 12b, 12c) to the evaluation device external to the vehicle, the component-identifier assigned to the respective vehicle component (12a, 12b, 12c) is used exclusively as the specific identifier, as well as the motor vehicle-identifier assigned to the motor vehicle.