The iTPMS of our XC90 doesn't have problems, it seems to be "ok". The TPMS system of many of the thousands
of Volvo's with TPMS probably have dTPMS. I read quite some complaints about the "i" version of TPMS and I
wish I could have had the "d" version as a paid option when we bought the car.
I don't like iTPMS, but surely you already know that