It consists of 17 digits and letters. According to the principle of permutation and combination, it will not be repeated within 30 years. Its function is to effectively identify vehicles. Some procedures (such as car transfer registration) need this number.
The engine number on the general driving license is the same as that on the front of the hood. The motor vehicle registration certificate includes the invoice indicating the engine number, the vehicle purchase tax or the factory certificate of buying a car. The invoice for buying a car also indicates the engine number. These four basic methods. Of course, the stupidest way is to open the hood and look at the engine number.
If there is any discrepancy, the automobile manufacturer may be required to return to the factory or return the goods. It may be an accident car or an assembly car that changed the engine number. The quality of these cars cannot be guaranteed, and the driving process is very dangerous.