The hinge is rough and makes an abnormal sound. Hinge is a part that connects the door and the body. Frequent hard opening and closing of the door will cause serious wear of the door hinge. After a long time, the door is not closed tightly, resulting in abnormal sound. Wash the sludge with rust lubricant, and then spray lubricant on the hinge. Changan UNI-V is a brand car owned by Changan.