tire pressure sensor

Hello, My 2018 Model-3 had done a software upgrade over the last Friday evening & I drove it over the weekend. But, today morning when I switched on my car I saw the (see attached snap) TPMS "Tire Pressure Low" error message on all four wheels... what are the odds that all four tires are having...

My wife's 2014 Model S is now giving "TMPS Needs Service" warnings. Tesla say that we need to replace one of the four sensors and have quoted us the grand total of £182.20 (that's about US $240) to have it replaced - which seems a bit steep, especially since it failed just out of warranty...