A moving car is a complex symphony of sound, most
of it reassuring—tires humming, engine rumbling, tailpipes roaring. But every
now and then a dissonant note creeps into the mix—and the alert driver's ears
prick up: Did you hear that?
Here's a guide that
identifies those oddball sounds and helps you sort out which conditions you can
let slide and which ones mean repairs—and how fast you need to make them.
