I'm pretty sure there is a sensor in each wheel well.
Did you drive a few miles after resetting? When I change from Winter to Summer wheels/tires it takes a few miles of driving before the actual reset occurs and there is a percentage display that shows how far along the reset is as I drive.
You can also look at the valve on your wheels to determine whether you have TPMS or your i3 uses the ABS sensors to compare rotation rate Left to Right . The TPMS valves are metal with a nut securing them at the base . The others valves are rubber .