Method for producing a vehicle, and safety belt assembly

A method for manufacturing a vehicle, the method comprising:

• mounting attachments on a vehicle body on a production line of a vehicle-manufacturing plant;
• fastening an attachment transponder to each of the mounting attachments, the attachment transponder being detected with the aid of an RFID reading device after the installation of the particular attachment in the vehicle for the purpose of a construction state documentation;
• installing a belt retractor of a safety belt assembly as the attachment in a cavity of a vehicle body column formed as a hollow girder on the production line;
• assigning at least one belt retractor transponder to the belt retractor, wherein 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.