A method for replacing a first module (30, 40) of a vehicle (1) with a new module (30, 30′, 40). The vehicle (1) includes: at least one drive module (30); and at least one functional module (40). The vehicle (1) has a unique vehicle identity. The method includes: setting (s101) the vehicle (1) into a maintenance mode indicating that the vehicle (1) is not available for operation; and preparing (s102) the vehicle (1) for physical disconnection of the first module (30, 40); when the first module (30, 40) has been physically disconnected from the vehicle (1) and the new module (30, 30′, 40) has been physically connected to the vehicle (1): establishing (s103) an electrical connection between the new module (30, 30′, 40) and the vehicle (1); assigning (s104) the new module (30, 30′, 40) the unique vehicle identity of the vehicle (1); setting (s105) the vehicle (1) into an operational mode; and verifying s106) the electrical connection of the new module (30, 30′, 40).