New 2016 Honda Accord making loud humming noise?

I leased a 2016 Honda Accord LX. Its not even 3 months old and it has 620 miles. Ive noticed a loud humming noise in the engine and not really sure what it is. Im skeptical to take it to the dealership cause Im tight on money right now and scared it could cost alot. But I also know a new car shouldnt be having any problems. Does anyone know if this is normal or is I should get it looked at?

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