The engine number is generally found on the outer surface of the engine cylinder block, or on the vehicle's nameplate, the nameplate inside the engine compartment. You can also check the engine number on the car purchase invoice; the factory certificate includes the engine number; for commercial vehicles, the operating permit can be used to query the engine number; the vehicle purchase tax payment certificate contains the engine number; the public security authority's registration records include the engine number; the vehicle insurance card has the engine number; the simplest and most direct method is to check the vehicle registration book or the vehicle's driving license. The engine number is like a person's ID number, representing each vehicle. It stores very important information about the vehicle. The engine model is an identification code assigned by the engine manufacturer in accordance with relevant regulations, corporate or industry conventions, and the engine's attributes for a batch of identical products. It indicates information such as the manufacturer, specifications, performance, characteristics, technology, usage, and production batch of the engine, including fuel type, number of cylinders, displacement, and static braking power, among others. Engines installed in cars or multi-purpose passenger vehicles are marked with the professional manufacturer's name, model, and production number as required by regulations. It's important to note that the engine number is not the same as the engine model. The engine model refers to the specifications and size of the engine within the manufacturer's range, and engine models can be the same. The engine number, however, refers to the production number of the engine, where each engine has a unique number and no two engines share the same engine number. Composition of the Vehicle Engine Number: Front Part: Includes the product series code, generation symbol, and regional or corporate code, selected by the manufacturer as needed with corresponding letters, but must be approved and recorded by the industry standard's regulatory body. Middle Part: Consists of the cylinder count symbol, cylinder arrangement symbol, stroke symbol, and cylinder diameter symbol. Rear Part: Composed of structural feature symbols and usage feature symbols. Tail Part: Differentiation symbol. When differentiation is needed within the same product series due to improvements or other reasons, the manufacturer selects appropriate symbols for representation, with the rear and tail parts possibly separated by a hyphen.
