Communication method and system for vehicles

The invention relates to a method and system for communicating between vehicles. A first vehicle detects an identification code of a second vehicle and performs an on-board comparison with stored identification codes. If the result is positive, a signal is transmitted, preferably to a control centre. This helps in tracking stolen vehicles, in particular if signal transmission from the stolen vehicle (the second vehicle) to a control centre is jammed. The system comprises units provided a plurality of vehicles capable of communicating with each other, preferably via blue tooth.