Be aware that TPMS (Tyre Pressure Monitoring System) is something else than a tyre pressure loss sytem.. Almost every car has the latter, it uses the ESP system to compare the rotation speed of the wheels. If 1 tyre goes flat it will spin faster, the system detects it and gives you a warning. TPMS actually measures the tyre pressure with a sensor inside the tyre and transmits this to the system in your car. You can actually see the pressure of each individual tyre. Check your datacard. The pressure loss system is option code 477, TPMS 470 or 475.I do have tyre pressure loss system.