Common faults of nv200 engine

The abnormal noise of the gearbox is really loud. I heard that it is a common problem. Can you last up to300,000 kilometers? (The master of the 4S shop said it was normal, and so was Li Wei. )

Second, when starting, the front wheel will occasionally hook, and I don't know whether it is steering or shock absorption (the plane bearing has been claimed).

Third, when the red light neutral brake stops, the idle speed will drop, and the car body can obviously feel the trembling about 1 s and return to normal (cleaning the throttle).

Fourth, when you turn on the air conditioner, you can obviously hear the sound of deflation when you turn on the range hood, which is about half a minute regularly (the 4S shop master said it was normal).