If someone had some theoretical device that could x-ray, 3d image, and 3d print an exact replica of your car though, that would be legal. That’s a closer analogy.
It’s not illegal to reverse-engineer and reproduce for personal use. It is questionably legal though to sell the reproduction. However, if the car were open-source or otherwise not copyrighted/patented it probably would be legal to sell the reproduction.
j4k3