If the fender of a car is loose, tightening it can solve the problem. The installation of mudguards depends on the use area of the vehicle. If the vehicle is usually driving in the urban area, there is no need to install fenders. But if you often drive on muddy roads, you need to install fenders. The main function of mudguards is to prevent dust, sand and dirt. The following is the installation method of mudguards: 1. Prepare fenders, pliers, screwdrivers, screws, nuts and other tools, and select the corresponding models. 2. Wipe the installation position of the fender with a wet rag for removal. 3. Find the screws and nuts reserved on the car, remove them with tools, and remove the fender of the original car. 4. Adjust the position of the new fender, and then screw the screws into the screw holes one by one with tools to install a fender. Be sure to tighten the screws and keep them stable. Otherwise, long-term bumps will easily lead to the fender falling off. A car has four fenders, and the other three can be installed according to the above steps.