I have a Cayenne Turbo S 2006 and it has the TPMS installed from factory. I have owned the car for three years but the TPMS never gave pressure readings on the dash. When I replaced all the tyres I purchased some new wheel sensors and had them fitted at the same time. The old ones were the originals from 2006 so probably had flat batteries. However I can't get them to register and give out pressure readings. Even after setting up the wheel diameters and tyre sizes on the dash display. I noticed each sensor had a sticker on it so I took a photo before they were fitted (see attached). Do they need to be set up on the PIWIS Maggie they will work? They are the same frequency as the old ones for Europe. Thanx if anyone could spare the time to explain how the get these to work........