Minn. Stat. § 168.15
Subd. 1. Transfer of ownership.
Subd. 2. Transfer of engine.
Upon the transfer of any automobile engine or motor, except a new engine or motor, transferred with intent that the same be installed in a new automobile, and whether such transfer be made by a manufacturer or dealer, or otherwise, and whether by sale, lease or otherwise, the transferor shall, within two days after such transfer, file with the registrar a notice or report containing the date of such transfer and a description, together with the maker's number of the engine or motor, and the name and post office address of the purchaser, lessee, or other transferee.