Machine learning device and machine learning system

A machine learning device provided in a vehicle, comprising a processor configured to:

• control actuators of the vehicle;
• predict predetermined information with a machine learning model;
• update the machine learning model;
• detect an electronic signal indicative of a replacement of a first vehicle part;
• acquire identification information of a second vehicle part which is installed instead of the first vehicle part after the replacement;
• and
• receive a new machine learning model trained using training data sets corresponding to the second vehicle part after the replacement from a server and apply the new machine learning model to the vehicle, in response to the first vehicle part relating to input data of the machine learning model having a different configuration than the second vehicle part.