Abstract: The invention relates to a system and to a method for calibrating a controller of a vehicle component, in particular at least of one section of a drivetrain of a motor vehicle, preferably of an internal combustion engine, wherein control data, on the basis of which the vehicle component is controlled, are stored in the controller, and wherein the method comprises the following working steps: identifying at least one first vehicle parameter of a plurality of vehicle parameters of calibrated variants of the vehicle component, which parameter has different values for different calibrated variants, preferably a rated power, an emission value and/or a market specification; checking, if the calibrated variants differ in terms of the at least one first vehicle parameter, at least one portion of the control data of the calibrated variants for a relationship with the at least one first vehicle parameter; defining, if a relationship is detected, a calibration function for the at least one portion of the control data on