It is unlawful for any person knowingly to advertise for sale, to sell, to use, or to install or to have installed, any device which causes an odometer to register any mileage other than the true mileage driven. For the purposes of this section, the true mileage driven is that mileage driven by the vehicle as registered by the odometer within the manufacturer's designed tolerance.
N.C. Gen. Stat. § 20-342