自90年代初起，进口汽车在国内日益增多，且势头不减。其配件供应、车辆维修在行业中的产权已占半壁江山。然而由于广大用户及配件供应商、维修厂对进口汽车的底盘号（俗称17位号）含义及其如何运用底盘号来购件修车均不甚了解，因此在工作中困难很多，并经常出错，纠纷不断。 Since the early 1990s, imported cars have been increasing in China with an increasing momentum. Its parts supply, vehicle maintenance in the industry has accounted for half of property rights. However, due to the majority of users and parts suppliers, repair shop on the import car chassis number (commonly known as the 17 number) meaning and how to use the chassis number to buy a car are not very understanding, so a lot of difficulties in the work, and often mistakes Disputes continue.