Generally the cars that have direct TPMS with sensors in each wheel report pressures (and also throw a warning when one is low) whereas the indirect systems tha

Generally the cars that have direct TPMS with sensors in each wheel report pressures (and also throw a warning when one is low) whereas the indirect systems that infer it from rotational speed only throw the warning and give you no more information (eg, which tire is low). My wife's 2008 Subaru Impreza had the worst of both worlds -- the cost of direct TPMS and no more information than the idiot light.