For a while, I kept hearing a buzzing sound when the car started, but I didn't take it seriously. Especially after washing the car, the noise became louder. After walking a certain distance, the noise disappeared, and it just kept coming over and over again. Today I went to the county seat and stopped for a while. As I was walking away, I heard the sound of forging behind me. The front wheels felt like they were going over a speed bump. I thought to myself that something was caught under the chassis, so I got out of the car and saw that there was nothing there. I continued to move forward. , it still made a thumping sound, and I was about to go to the car repair shop. When I turned at the intersection in front of me, the sound suddenly stopped, so I decided not to do anything and go to the repair shop. After I went there, the master said that there might be pebbles in the wheel discs and they were thrown out while driving. I was still worried and asked him to check because I had not checked the engine oil before when I went out of the province. As a result, the engine oil had been damaged. When I reached the lowest mark, I was very frightened while running on the highway. When I arrived at my destination, I saw that the oil could not be measured on the scale. I immediately went to the 4S shop, spending a lot of money and delaying things. This time the master carefully checked the brake pads again. It turned out that the rear brake pads were worn away and were grinding the iron disc, so there was a sound. Therefore, if there is any abnormality in the car, check it immediately and prevent it from being towed.
