There is only one frame number, which is a set of characters assigned to a car by the manufacturer for identification.

The VIN code is a code consisting of 17 letters and numbers, also known as 17 identification code, frame number or 17 number.

Just like the ID card, a car has only one frame number, which can make the same model of car not have the phenomenon of duplicate number within 30 years, and has the unique logo of the car, so it can be called "car ID card".