An extended warranty for cars is kind of an insurance policy for anything that may go wrong after your factory warranty runs out. There are a number of things that you need to think about when you try to consider if an extended warrantee is for you.
The first thing you want look at his the kind of factory warranty your car comes with. For instance, Hyundai these days comes with a 10 year/100,000 mile warranty on all the essential parts. There are some manufacturers who will only cover your car for a third of that. You need to think about how long you plan on keeping your car. If it's about as long as the guarantee lasts or only a year longer, you have no reason to mess with any extended warranties.