How reliable are tyre pressure sensors?

[tapkaJohnD]

Citroen C5, 2011. Just had the tyre pressure sensor in left front wheel replaced, as it was indicating "Flat Tyre" when it wasn't. A week later, right rear sensor is doing the same. Pressure good, "Flat tyre" warning.
Are they all going to go?

John

[tapkaJohnD]

A search elsewhere has found much evidence that this is a known problem, including complete blowouts on the Mway, as the valves and sensors disintegrate. You would think this is a major recall danger, but Citroen claim they are unaware of a problem.

I would complain to my dealer, and hope for a discount on all four, but they have just gone to another manufacturer, and ain't Citroen delaers no more.

John

[Oldandslow]

Had yours disintegrated?

Was it just not transmitting anymore? The batteries might just be going flat after 8 years.

[tapkaJohnD]

No, intact, thank goodness, but blow-out is a worrying idea.

It's quite possible that mine are just running out of batteries, which I don't think are replaceable, without replacing the whole sensor/valve unit. Apart from anything else, mine won't pass the next MoT without working tyre sensors, so I need to do it, if I want to keep it much longer..
See: https://www.tirereview.com/changing-tpms-sensor-ba...

As modern cars have become more monitored and with integrated sensor systems, this is going to limit their life more than any deterioration in structure or wear in components.

John