“Remember the Ford Explorer/Firestone tire debacle from a decade ago? Thousands of the ‘utes rolled-over and much of the blame fell on insufficiently inflated tires, costing the Blue Oval billions of dollars to replace the tires on just about every Explorer still left on the road. The other fallout from Explorer-gate (or Firestone-gate) was institution of the Tire Pressure Monitoring System that’s now a legal standard on every car and truck built since 2008.
TPMS sensors constantly measure the pressure in all four tires, and when one or more tires is more than 25 percent below the recommended amount, a light illuminates on the gauge cluster. Most of us know the light (on right) and if you do, you’re among the 54 percent of drivers who know what it means. But more importantly, less than half of the population doesn’t.”