The Quickset Light TPMS Reset Tool is the ideal tool for the DIYer who wishes to reset the TPMS light himself, after having changed or rotated tires, or replaced a dead TPMS sensor. This simple TPMS relearn tool transfers the new TPMS sensor ID’s into the vehicle’s ECU (Electronic Control Unit). The Quickset TPMS reset tool can store two sets of wheels for each car (summer and winter tires) and is limited to four cars.