The owner of Tesla Model 3, creative Amy DD, implanted a key card in her hand in order to have access to her car always. Note, earlier she had already implanted foreign objects into her body, for example, many years ago she implanted the FRID tag, which she used to open the front doors of her house. When she pre-ordered Model 3, she realized that she can do something similar with a key card.
She taped the whole process on the video and posted it on her YouTube channel. She removed the card chip from the plastic and implanted it in her forearm. To do this, she dissolved the card with acetone and enclosed it in a biopolymer. From there, she went to a body modification studio to insert a chip (the size of a Lego mini-figure).
Later she wrote on her Twitter that her arm was swollen immediately after the chip was implanted, and demonstrated that the device really recognized the NFS chip in her hand.