I switched my winter tyres back to summer tyres recently. I got new wheels and new TPMS sensors and old summer tyres. Asked the local tyre shop if they are ok fitting them as they did not supply them, they said yep sure.
Turned out they fitted the valves incorrectly. It’s a clamp on valve stem and they fitted them with the metal washer over the rubber gasket so the rubber gasket could not make a seal with the wheel. Also the valve stem should be fitted first and then the sensor clipped on afterwards. They didn’t do this so now the valve to stem interface is damaged so I can’t just get new valve stems and have to get new TPMS sensors too.
Further more I found out all this once I was 1.5 hours away with seriously deflated tyres and had to pay a nearby garage to replace the TPMS sensors with normal rubber valves. The rubber gaskets where twisted inside the metal washers and damaged and second tyre shop said they would not refit them as they didn’t think it would be safe.
So I thinking I can certainly get a refund on the original fitting fee as they clearly messed up. But can I also ask them to supply new sensors or refund cost of new sensors and also ask for refund for the cost of replacing the sensors for basic valves too?