* Chassis number (VIN): A unique identifier for the entire vehicle. It's a permanent marking that identifies the make, model, year, and other key information about the vehicle. It's usually found on the dashboard, door jamb, or under the hood.
* Engine number: A unique identifier for the engine itself. It's separate from the vehicle's chassis number and can be used to trace the engine's history and specifications. The location of the engine number varies greatly depending on the make and model of the vehicle.
While they are both important identifiers, they identify different components of the vehicle.
