Do tire pressure sensors use individual batteries (that may last only 10 years) rather than the car’s electrical system? Could such a battery replacement cost about $85 for each wheel?

What about other sensors on the car? Are they battery powered, too? -- Ken

RAY: Let me guess, K

Set to desired PSI and fill

That low-tire-pressure indicator is always unnerving. But having a tire inflator in your trunk as part of a vehicle emergency kit provides all the assurance you need. In minutes—sometimes seconds—the best tire inflator lets you add air to your wheels with

When the weather gets frigid, you might see that warning.

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David Sickels is the Senior Editor of Fleet Equipment. He has a history of working in the media, marketing and automotive industries in both print and online.

You’ve heard it all before: Tires are the second-highest annual cost for the average fleet, only behind fuel, and a major compo