UPDATE:
After 3 months of looking at the "TPMS System failed" message , my winter tires now have the newly cloned Autel 433MHz sensors (s/n copied from my summer tires), ... error message on my 2012 Model S gone.
4 - Autel TPMS senors $149.00 (eBay)
Autel MaxiTPMS PAD $64.00 ( Amazon ) - for...