I know there have been several threads pertaining to using a real spare in the Fusion Hybrids, but I'm concentrating on the use of Ford's actual Mobility Kit. I've heard rumors that using the can of sealant that Ford provides causes loss of your TPMS sensor. People have sworn this is the case; however, I went to my dealer Service Department and they told me that Ford would warrant the TPMS and replace it if anything like that happened due to use of the Ford provided product. Wal-mart sells Fix-A-Flat that is marked "Safe for TPMS" sensors, but that's not what Ford is using evidently. Has anyone had the opportunity to have to use the Mobility Kit yet? What happened?