The National Highway Traffic Safety Administration (NHTSA) has issued survey results on the effectiveness of tire pressure monitoring systems (TPMS). The technical report analyzes a sampling of data collected from tires mounted on model-year ’04–’07 vehicles. The survey found that 23.1% of the vehicles without a TPMS had at least one severely underinflated tire (25% or more below the recommended cold tire pressure). Only 11.8% of TPMS-equipped vehicles had an underinflated tire. The percentage dropped even further, to just 5.7%, for a sampling of model-year ’08–’11 vehicles. The NHTSA also estimates that its TPMS rule saved $511 million in 2011 in reduced fuel consumption as a result of more properly inflated tires. A copy of the report is now available.
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