Motor vehicles have an emission label located under the hood or in the engine compartment.

How do I find my emissions number?

Your vehicle's EFN is located under your hood on the Vehicle Emissions Control Information (VECI) label. Depending on your make and model, the VECI label can be mounted in several possible locations. Typically, the label can be found on the actual underside of the hood or on the fender well.

What is emission label?

An emissions label is the primary means used by EPA to have manufacturers demonstrate that their non-road engines meet emission requirements (or are exempt from them). ... Increasingly, EPA has looked to emissions labels as an initial basis for enforcement actions at the border.