If you're driving something on the older side, your vehicle's sound system may leave a lot to be a desired. You don't have to be stuck with it, though.

Automotive parts retailer AutoZone Inc. reported a better-than-expected quarterly profit on Tuesday, helped by a do-it-yourself trend among customers wanting to keep their older cars on the road.

What’s bad news for car owners is good news for AutoZone and its shareholders.