When there is unknown vibration or abnormal noise in the car body, where should I start to check? 

I believe that many friends who drive often find that sometimes the car will have unknown vibrations or abnormal noises. This phenomenon sometimes lasts forever or only appears under certain specific conditions. In most cases, these feelings or sounds mean that the car is malfunctioning. If there is some damage or abnormality, if it can be dealt with in time, you can avoid a lot of money losses and the chance of unfortunate accidents!