Now the front and rear bumpers of cars are mostly plastic, and some high-end cars are made of FRP and carbon fiber ... Not to mention the new Sail of the landlord, the front and rear bumpers of Audi A6 are all plastic, and even the front fenders of a few cars are all plastic. Except the front and rear bumpers of Chevrolet Sail are plastic, the whole body shell is sheet metal. The landlord may mistakenly think that the front and rear bumpers are iron-resistant, but they are not! If the front and rear bumpers of a car are made of iron, first of all, the weight of the car will increase and the fuel consumption will increase; Secondly, once a collision occurs, even if it is slight, it will be more time-consuming and laborious to repair, and the cost will be higher! Plastic front and rear bumpers are light in weight, easy to maintain and replace, and relatively low in cost. There are energy-absorbing blocks, anti-collision bars, etc. Under the bumper. Under the protection of these materials, normal collision will generally not hurt the main components such as the engine, so the landlord need not worry!