✔ 最佳答案
I think your car is running around or even 100,000 KM.
The Cam belt is driving the camshaft from the cylinder. You may not know the detail mechanism. But the importance is if the Cam belt is broken, it will seriously harm the engine and the worest case need to replace the engine which cost you much dollars. Usually need to replace every 100,000KM
There not only one 皮帶 in the engine room, but multiple. They include heating fan, dynamo (electricity generation) and others. If they are boken, some may cause overheet, no electric, etc. Different 皮帶 have different purpose.