Scott3:

 

A great number of cars have Battery powered TPMS (my Model Y does).

 

Running without a spare tire, I think they are essential to have operational. (I carry a little compressor so can pump a slow leak back up again if I catch it before the tire gets destroyed).

 

 

 

Tesla ones are AUD120 each. Aliexpress ones that look identical run at AUD100 for four. It's possible cut them open and solder in new batteries, but the intent is they get swapped out.


You need the tires off to the rims to be able to swap or work on the sensors.

 

 

 

Just checked the voltage on mine. They are all in the 2.97 -2.98V range (apparently 3V is full and 2.6 - 2.7 V requires replacement) - Was expecting much lower on a 2022 car (perhaps mine were replaced prior to my ownership).

 

 

 

Looks like the TPMS modules are $120 NZD on the Tesla NZ site.

How did you check the voltage - is there someting in the service menu?

And as others have posted - there are 2 types of TPMS.

First type has a battery and module that sits inside the wheel rim under the valve stem - they have a battery that reports to the car (and eventually expires after some years).

Second type is (Accordng to Google AI):

Passive TPMS (also known as indirect TPMS) is a cost-effective, software-based tire pressure monitoring system that utilizes existing ABS/ESC wheel speed sensors to detect pressure loss by monitoring changes in rotational speed and vibration. It requires no sensors inside the tires, making it maintenance-free and cheaper than direct systems, though it cannot measure exact pressure and requires manual resetting.

I gather there is a 'budget' model Y in some markets that has a few stripped down features to cut the price back - one of which was a move to the 'Passive TPMS'.

Dont think that model is available in NZ.