Tyre pressure monitoring - Enlighten me please

[Skyedriver]

As an old person who is more used to checking tyres on a Sunday morning (along with oil, water, brake fluids, belts etc), how does the tyre pressure monitoring system on a 2017 Cooper work please.
If I was to replace one wheel with (I assume) no monitoring system, what would be the result?
Thanks

[un1eash]

The tyre valves in the wheels contain the sensors. If you replace a wheel you need to either register the new tpms sensor with the car or remove the one from the wheel your replacing.

[Skyedriver]

Thanks, usually, when you get new tyres they replace the valve. Are the tyre pressure valves a better quality?

[Dolf Stoppard]

Look at the valves and you’ll see how they’re different to a ‘normal’ valve which doesn’t have the TPMS built in.

[Armitage.Shanks]

In my view the TPMS is a complete PITA. They seem to under read what the true tyre pressures are and cause a 'default' check tyres warning once a month interfering with whatever display you have up.

I don't think they are battery maintained but more magnetic. I had my wheels refurbished recently and one of the TPMS valves had siezed onto the wheel requiring replacement. A new one (presume non-OEM) was £10 but no setting up was required as it seemed to auto register with the inbuilt system after a few miles. (2015 F56)

If I could completely disable it that would be my preference. Getting rid of the runflats was also a revelation and wish I'd not waited 4yrs for the tyres to wear.

[un1eash]

They definitely use batteries on BMW/Mini, they last 5-7 years in average. Mine are pretty accurate as I'm OCD about my pressures and always check them against a manual gauge.
You can code the system out but it is now a requirement on all new build cars sold in the EU since late 2014.

[Armitage.Shanks]

un1eash said:

They definitely use batteries on BMW/Mini, they last 5-7 years in average. Mine are pretty accurate as I'm OCD about my pressures and always check them against a manual gauge.
You can code the system out but it is now a requirement on all new build cars sold in the EU since late 2014.

If that's the case I can't believe they are only £10 each as that's what I was charged by the chap who refurbished my alloys

[un1eash]

Armitage.Shanks said:

If that's the case I can't believe they are only £10 each as that's what I was charged by the chap who refurbished my alloys

Was that for a whole sensor or just the valve stem? It's the stems that can seize into the alloy as there also made of some sort of alloy steel.