首先,你买的仅仅是轮胎还是轮胎加WHEELS. TPMS(tire pressure monitoring snsors) is installed on your original wheels. if you changed the tires and the wheels, you car does not have the sensor. So the TPMS will give you warning sign. If you used the original whells and just replace the tires, the TPMS should be reset after you inflat the new tires(refer your manual). Another reason is the sensor(s) is demaged during the installation.