I previously got new sensors and successfully got the system to learn them without any tools.
I thought there was a writeup somewhere.. I sold my gts years ago but just bought an S because I've always wanted a manual.
Anyway if I remember correctly the procedure is the same except that the sensors get activated manually ; use a tool or safe object to release air pressure rapidly from each tire.. For about 10 seconds full blast. The pressure drop activates the sensors.
Hope this helps someone and saves them money!
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