Ok, I have a few questions... I too want a tpms. There are choices - internal vs external. I see the advantage of internal as more secure... But more pricey?
Batteries- I imagine its a bummer to change batteries on the internal sensors.
And do they effect tire balance. Not so much a deal for internal - they would be installed at tire shop. But, external.
Do the monitors have some type of audible alarm? I can't look constantly at it!
Do the external sensors flex the valve stems?
Joe