Passenger's door side. According to the information of car home official website, the frame number is used to identify the vehicle information. The frame number of chery e5 is on the side of the co-pilot door, on the door lock post or on the post of one of the doors connected with the door lock post. Frame number is a vehicle identification code (VIN), which consists of 17 characters, so it is commonly known as 17-bit code.