A used car is one of the few big purchases where the seller almost always knows more about the product than you do. They have lived with its quirks, its noises, and the repairs it is quietly overdue for. This checklist exists to close that gap. Move through all 27 items and you stop shopping on gut feeling — you start buying on evidence, which is exactly the footing you want when real money is on the table.
The list is built in two halves. The first five items are homework you finish at your kitchen table; the rest only make sense once you are standing next to the car with the keys in your hand. Do them in that order and you will rarely waste a Saturday driving out to a lemon.