Feng Shui is an environmental science, a folk tradition handed down for thousands of years, and an established habit and way of thinking. Feng shui is not a supernatural superstition, and buying a car seems a bit irrelevant.
Don't worry too much, but everything is connected, just like the butterfly effect. If you care, you can consider several points: First, you can choose auspicious days and avoid them. Buying a car is also a "big deal" for your family. Choose an auspicious day appropriately and make a good sign. The second is to follow the meaning of some names. The third is to keep the vehicle clean, keep the vehicle safe, and keep the parking place sun-proof, sun-proof and moisture-proof. A car can also be regarded as a mobile "home".
All the above are based on psychological suggestion and consideration of health impact, and have little connection with traditional geomantic omen. I hope I can help you.