I don't think you have much to worry about with what you're asking..What you should be worried about is the 4.8is that you buy should be thoroughly inspected, checked out, preferably low miles, no wrecks, etc. That is the key to buying a used car. This will also be a strong indicator as to what to expect out of the car in the future when you have it. If it wasn't taken care of, or just barely maintained then yeah, chances are high that you're going to experience problems.. obviously if you're buying new, then you shouldn't really be worried.