Delaware Code Title 21. Motor Vehicles § 6406. Lawful service or replacement

(a) Nothing in this chapter shall prevent the service, repair or replacement of an odometer, provided the mileage indicated thereon remains the same as before the service, repair or replacement.  Where the odometer is incapable of registering the same mileage as before such service, repair or replacement, the odometer shall be adjusted to read “0” and a notice in writing shall be attached to the left door frame of the vehicle by the owner or the owner's agent specifying the mileage prior to repair or replacement of the odometer and the date on which it was repaired or replaced.