Locating the engine model number: Check the outer surface of the engine block, vehicle registration certificate, motor vehicle registration card, purchase invoice, factory certificate of compliance, operating license for commercial vehicles, vehicle purchase tax payment certificate, public security registration records, vehicle insurance card, or the actual engine (usually on the engine nameplate). The engine number, much like a person's ID number, uniquely identifies each vehicle and stores crucial information about it. The engine model is an identification code assigned by the engine manufacturer in accordance with relevant regulations, corporate or industry practices, and engine attributes. It represents information such as the manufacturer, specifications, performance, features, technology, purpose, and production batch of the engine, including details like fuel type, number of cylinders, displacement, and static braking power. Engines installed in passenger cars or multi-purpose vehicles are required to display the professional manufacturer's name, model, and production number. 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 product line, and multiple engines can share the same model. In contrast, the engine number is the production serial number, unique to each individual engine. Composition of the car engine number: Prefix: Includes product series code, generation symbol, and regional or corporate code. Manufacturers may choose appropriate letters as needed, subject to approval and filing by the industry standardization authority. Middle section: Consists of symbols for the number of cylinders, cylinder arrangement, stroke, and bore diameter. Suffix: Comprises symbols for structural features and usage characteristics. Tail: Differentiation symbol. When differentiation is required due to improvements or other reasons within the same product series, the manufacturer selects an appropriate symbol. The suffix and tail may be separated by a hyphen (-).
