US Patent 11027699 Backup key with wireless capabilities

A keycard may include electronics to allow access to vehicle functions. A keycard system for a vehicle includes a plurality of sections of a stacking key, and a keycard, including a key holder defining a plurality of sleeves, each sleeve having an opening for receiving a respective one of the plurality of sections, wherein the key holder further includes electronics configured to wirelessly provide access to the vehicle. A foldable keycard includes hinged sections, each defining a base and a layer of a blade of a key extending therefrom; and an electronic vehicle access component arranged at the base of one of the sections opposite the blades, and configured to fold away from the blades to allow the keycard to be inserted into a lock.