Vehicle Identification Number (VIN)
Frame number

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The VIN is the number used in registering your vehicle and in all legal matters pertaining to its ownership, etc.
The number is punched on the engine compartment frame and back side of the engine.
VIN label (if equipped)

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The VIN is also on a plate attached to the top of the left side dashboard. The number on the plate can easily be seen through the windshield from outside.