ATEQ Tire Pressure Monitoring System (TPMS) Sensor Relearn Training Magnet ATEQ TPMS Relearn Training Magnet used for vehicles that require a magnet during the reset process. Required on some: Cadillac, Chevrolet (Chevy), Ford, Lincoln and Mercury vehicles (to name a few), View the ATEQ Website if you are unsure your vehicle needs a magnet. Can be used to replace Schrader part number #20143 TPMS Magnet used for activating sensors on some vehicles.