2012 Toyota Avalon Owners Manual - Page 403
2012 Toyota Avalon Manual
Page 403 highlights
4-3. Do-it-yourself maintenance Registering ID codes The tire pressure warning valve and transmitter is equipped with a unique ID code. When replacing a tire pressure warning valve and transmitter, it is necessary to register the ID code of tire pressure warning valve and transmitter. Have the ID code registered by your Toyota dealer.