I'd be interested to know more about your tyre pressure sensors Kos. Are they factory fitted by the car manufacturer or an afterfit? What make are they?
I bought a set of Tyrepal sensors which just screw onto the valve, replacing the cap. If a valve is damaged it can just be replaced and the sensor moved onto the new valve. If a sensor is damaged a replacement can be bought (£33, I think) and just screwed onto the valve. It has to be programmed to the receiver but that is a 2-minute job that you do yourself.