Any idea how long a TPMS sender battery is supposed to last? 2012 Prius v Five TPMS'ing on borrowed time? Going to replace tires in the spring and wonder if I should replace TPMS (or the batteries if those are removable). Thanks.
I'll answer with writing 10 years (even more) would not be unusual. So, with your 2012 I would not replace the sensors yet.
You would have to replace the whole thing, not just battery, and it's way too soon, battery's should be fine. The tire place will likely propose a rebuild kit, basically new valve and gaskets. If that's not too much it might simplest to just go along with them, hopefully they do it right.
My 2006 (first TPMS year) going on 11.5 years now for three of them. One died at 9.5-yr. Depends a little on total mileage mine is 165k miles. The TPMS battery is OFF when the car is OFF, so that's why total miles is an indicator.
Interesting. Centripetal or centrifugal force switching? Guess these can stay on rim @ 33,000 miles. Thanks, all !
The service pack is just hardware for remounting the stem so it doesn't develop a leak after time. Batteries are not replaceable without invasive surgery into the sender unit; I don't know of anyone rebuilding them. Probably a liability issue. While I keep reading the TPMS sensors don't signal when the car is not moving, it is possible to dismount a working sensor and get it to send a "valid" signal by either placing it into a pressure vessel or squeezing it with a clamp. A mechanism to conserve battery life while the vehicle is not moving makes huge sense, but that isn't necessarily consistent with those tests.
They are passive transponders to a device that 'pings' them, which is how the device ID can be identified, on rim.
No, these are typically passive transponders, initially powered-on by electromagnetic energy transmitted from a 'pinger' (reader), either external or the vehicle TPMS system, which makes it logical that remaining battery life would be a function of vehicle 'Hobbs meter' running time or mileage. By contrast, an active transponder is constantly powered, and battery life would be more a function of time since installation.
I think they work when car is not moving as long as vehicle is ON (if you are talking about Prius OEM)
