When we first started we were going through sensors at about 3-4 a week. Kept arguing with WNA until the design changed. they are currently on rev 3, and there is a way to tell which rev of sensor you have but I cant find my documentation on how that is done. Maybe someone else has it. With Rev 3 we started to slow the rate of usage down, but it wasn’t until we had WNA come out and re tune the engines did we stop using sensors. After tuning we are down to about 2-3 per year.
I am down to just keeping 6 in stock