The Tire Pressure Monitoring System informs the driver of a tyre pressure loss. As of November 2014, all new cars sold in the EU must be equipped with the system, which comes in two versions - indirect and direct. The former uses the ABS/ESP system to compare the rotational speed of one wheel relative to the other wheels. The latter, considered to be more precise, uses electronic sensors fitted on each wheel in order to measure the pressure in real time. If the pressure goes down below a recommended level, a warning light on the dashboard goes on. The most frequent cause of a TPMS sensor failure is its damage during tyre change.