A manufacturer assigned identifier of the primary motor in a vehicle.
Usage Note:
The number is usually stamped on the motor by the manufacturer. Some motors have the number on a plate or sticker attached to the motor.
Traditional gasoline vehicles have one engine. Hybrid and electric vehicles may have more than one motor, in these cases the number refers to the motor that provides the most power. In the case of a vehicle with multiple motors of equal power, either engine number can be used.