Oh boy, didn't work. I replaced the battery as careful as I could, went for a ride and nothing.
Now I have to find out if the GS 911 will shut off that pesky light on dashboard.
If not, I will have to wait with those light on (warning and rear tire) for one year at least, when time comes to replace the tire.
Do you know if those sensor they sell at Ebay really work?
As you can see here I'm trying to avoid the quite expensive new sensor.