Originally Posted by KEF

Anything is possible, but one would need to know exactly what is being transmitted - my understanding is that this system is measuring RPM differential in the wheels. But that is what I understand by what has been written on line, so it has a 50% chance of being correct.

I do know that is how the E46 M3 worked, but I also know the M3 did not have the complicated sensors this X5 is using to measure it. The M3 used the ABS sensors to measure wheel RPM to do the rotational math and ultimately determine if one tire was getting low.

Next week I'll call a Master Tech that I know and find out if he knows how this really functions, by RPM or actual Pressure.

Cheers,
KEF