A method for manufacturing a vehicle, in which, on a production line of a vehicle-manufacturing plant, attachments are mounted on a vehicle body, to each of which an attachment transponder is fastened, which, after the particular attachment is installed in the vehicle, is detected with the aid of an RFID reading device for the purpose of a construction state documentation, a belt retractor of a safety belt assembly being installed as an attachment in a cavity of a vehicle body column formed as a hollow girder on the production line. A belt retractor transponder is assigned to the belt retractor. The belt retractor transponder is not fastened directly to the belt retractor but rather to a belt strap of the belt retractor outside the body column cavity.