Method for determining, by a computer system, data characterizing at least one change in the temperature of a component of a motor vehicle during a time interval, characterized in that the method comprises the steps of: i) acquiring data characterizing at least one probability of carrying out at least one sequence of use of the vehicle; ii) acquiring data characterizing at least one duration or at least one distance and at least one stabilized temperature with respect to at least one segment of at least one sequence of use of the vehicle; iii) acquiring data characterizing at least one thermal inertia value with respect to at least one segment; iv) acquiring data characterizing at least one number of sequences of use; v) acquiring data characterizing at least one value representing the autonomy of the vehicle; vi) determining data characterizing an estimate of a number of sequences of use carried out; vii) determining data characterizing a particular sequence of use of the vehicle as a function of the data characterizing at least one probability of realization of at least one sequence of use of the vehicle; viii) determining data characterizing a duration for each of the segments of the particular sequence of use of the vehicle; ix) determining data characterizing a stabilized temperature value for each of the segments of the particular sequence of use of the vehicle; x) determining data characterizing a point value of the temperature of the component during a current segment of the particular vehicle use sequence as a function of data characterizing the stabilized temperature during the segment of the particular vehicle use sequence that precedes the current segment of the particular vehicle use sequence, data characterizing the difference between the stabilized temperature during the current segment of the particular vehicle use sequence and the stabilized temperature during the segment of the particular vehicle use sequence that precedes the current segment of the particular vehicle use sequence and data characterizing the ratio between the time elapsed since the start of the current segment of the particular vehicle use sequence and the thermal inertia value for the current segment determined from the data characterizing at least one thermal inertia value with respect to at least one segment; and xi) determining the data characterizing at least one change in the temperature of a component of a motor vehicle using the data characterizing at least one point value of the temperature of the component during a current segment of the particular sequence of use of the vehicle. i) acquiring data characterizing at least one probability of carrying out at least one sequence of use of the vehicle; ii) acquiring data characterizing at least one duration or at least one distance and at least one stabilized temperature with respect to at least one segment of at least one sequence of use of the vehicle; iii) acquiring data characterizing at least one thermal inertia value with respect to at least one segment; iv) acquiring data characterizing at least one number of sequences of use; v) acquiring data characterizing at least one value representing the autonomy of the vehicle; vi) determining data characterizing an estimate of a number of sequences of use carried out; vii) determining data characterizing a particular sequence of use of the vehicle as a function of the data characterizing at least one probability of realization of at least one sequence of use of the vehicle; viii) determining data characterizing a duration for each of the segments of the particular sequence of use of the vehicle; ix) determining data characterizing a stabilized temperature value for each of the segments of the particular sequence of use of the vehicle; x) determining data characterizing a point value of the temperature of the component during a current segment of the particular vehicle use sequence as a function of data characterizing the stabilized temperature during the segment of the particular vehicle use sequence that precedes the current segment of the particular vehicle use sequence, data characterizing the difference between the stabilized temperature during the current segment of the particular vehicle use sequence and the stabilized temperature during the segment of the particular vehicle use sequence that precedes the current segment of the particular vehicle use sequence and data characterizing the ratio between the time elapsed since the start of the current segment of the particular vehicle use sequence and the thermal inertia value for the current segment determined from the data characterizing at least one thermal inertia value with respect to at least one segment; and xi) determining the data characterizing at least one change in the temperature of a component of a motor vehicle using the data characterizing at least one point value of the temperature of the component during a current segment of the particular sequence of use of the vehicle.