Cars produce an array of noises.
From the sound of your tires gripping the pavement to the revving of your engine when you accelerate (unless you drive an electric car), most of these noises indicate a perfectly functioning vehicle. In fact, because they're so common, you probably don't even notice most of the noises your car makes. But like an off-key note at a piano recital, a dissonant sound can make you sit up and take notice.
If you care about safety and saving money, regular tire maintenance and rotation should be high on your to-do list. Proper tire rotation and inflation can extend the life of your tires, lead to better fuel economy and improve the safety and handling of your car.
When it comes to protecting your vehicle, you have car insurance in case you get into an accident. But what if you need a new transmission? What if your engine needs work? Unless you've got a mechanic friend who just happens to have all the right parts laying around (and some free time), you're going to be stuck paying for it out of pocket if your vehicle isn't under manufacturer's warranty.