It's not important at all until you need it. Even if you only use it once or twice a year. When you need it you'll wish you'll had had it. I will never own a truck without 4x4. And when you have it, use it. that is very important. Just to make sure it is in working order. Vacuum lines can break and you not know it. Happened to a friend during deer season. Nothing worse than sittin in a 4x4 stuck and wishing it worked!