Where to Find the Engine Number and Chassis Number?

[HeidiLynn]

The engine number is usually located on the outer surface of the engine block, or on the vehicle's nameplate or the nameplate inside the engine compartment. The simplest and most direct method is to check the vehicle's administrative green book or the vehicle's registration certificate. The engine number is like a person's ID number, representing each vehicle. It contains very important information about the vehicle. The chassis number is stamped on the vehicle's frame. The exact location varies by manufacturer, so you can refer to your vehicle's manual. The engine model is an identification code assigned by the engine manufacturer in accordance with relevant regulations, industry or company conventions, and the attributes of the engine. It represents information such as the manufacturer, specifications, performance, features, technology, purpose, and production batch of the engine, including fuel type, number of cylinders, displacement, and static braking power, among others. Engines installed in passenger cars or multi-purpose passenger vehicles are required to display the professional manufacturer, model, and production number. The chassis number, commonly referred to as the Vehicle Identification Number (VIN), is a unique code assigned by the manufacturer to identify a vehicle. The VIN consists of 17 alphanumeric characters, also known as the 17-digit identification code, chassis number, or 17-digit number. The combination of these characters ensures that no two vehicles of the same model will have the same number within 30 years, making it a unique identifier for the vehicle, often referred to as the 'car's ID card.' Common locations include the vehicle registration certificate and the lower left side of the front windshield. 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 lineup, and multiple engines can share the same model. The engine number, however, is the production number assigned to each individual engine, and no two engines will have the same number. Structure of the Engine Number: Prefix: Includes the product series code, generation symbol, and regional or company code. Manufacturers may choose the appropriate letters, but they must be approved and filed with the industry standard authority. Middle Section: Consists of symbols for the number of cylinders, cylinder arrangement, stroke, and bore diameter. Suffix: Comprises symbols for structural features and intended use. Tail: Differentiation symbol. If a series of products requires distinction due to improvements or other reasons, the manufacturer may choose an appropriate symbol. The suffix and tail may be separated by a hyphen. The chassis number consists of 17 characters divided into three parts. Part 1: WMI—World Manufacturer Identifier (positions 1-3); Part 2: VDS—Vehicle Descriptor Section (positions 4-9); Part 3: VIS—Vehicle Indicator Section (positions 10-17).

[LaKaden]

I remember when I first started driving, I often wondered where to find these things. The VIN (Vehicle Identification Number) is usually located on a small label with a long string of numbers at the lower right or left corner of the windshield in front of the driver's seat; the same information is also stamped on the inner door frame after opening the door. The engine number requires opening the hood to see—it's typically engraved on the side or top of the engine block. If there's oil or dust on the surface, just wipe it with a cloth to make it clear. While not commonly used in daily life, it becomes important when buying or selling a car, filing an insurance claim, or getting repairs—the vehicle registration certificate has backup records. To avoid poor visibility in low light at night, it's best to check during the day and take a quick photo with your phone for easy reference, so you don't have to keep digging through car insurance documents. Don't worry about it being complicated—it's just a simple identification code.