WASHINGTON (May 19, 2009)—Analysis at the National Highway Traffic Safety Administration shows tire pressure monitoring systems are highly effective in preventing significant underinflation of tires, according to “Tire Pressure Maintenance—A Statistical Investigation,” a paper issued by NHTSA.
But TPMS also are likely to result in overinflation, though within safe limits, the agency said.
According to the paper, 57 percent of the surveyed vehicles with TPMS had correct tire pressures, compared with 43 percent of those without the devices. Fifty-three percent of the TPMS vehicles, however, had at least one overinflated tire, compared with 47 percent of the control tires.
NHTSA conducted the analysis on 2,316 vehicles through the infrastructure of the National Automotive Data System's Crashworthiness Data System.