Files with the .CAR extension contain data stored in the eXtensible Car Description - XCD for short - format for a given car, such as its make and model, year of manufacture, price, physical dimensions, and associated images. CAR files are used by Car Explorer to view information about different cars. The app is, however, no longer supported.

CAR files were supposed to store data about all models of one brand or company from a given yearbook. They were distributed as collections - archives containing many packed CAR files.