A car can have problems from the momment you drive it off the lot. Sometimes these problems can be difficult or even impossible to fix, such as an odd vibration when driving on the highway. Once you sign the papers and leave the lot, though, the car and its problems are yours (at least until a lemon law kicks in).
To avoid having this happen with any car you buy, be sure to drive the actual car (not just one like it) before you sign the papers. When driving the car, drive it at a variety of speeds, from around town to the fastest you’re likely to go on the highway. Pay close attention to how the car sounds and feels. Are there any odd noises or vibrations?
Also closely inspect the exterior and interior for blemishes or damage. One panel member ended up having a new vehicle almost entirely repainted after taking delivery at night.
Which reminds me: don’t take delivery at night.