The steps for disassembling and assembling the car bumper are:

1. Remove the cover, clips, screws and bolts of the bumper;

2. Pull the bumper in the wheel arch area;

3. Take out the bumper on the side and replace it with the same type of bumper.

The bumper consists of an outer panel, a buffer material and a beam.

Its role is:

1. It has the function of safety protection;

2. It can alleviate external impact;

3. The role of pedestrian protection;

4. It is decorative;

5. Improve the aerodynamics of the vehicle.

The repair methods for bumper scratches are:

1. Apply toothpaste to the shallow scratches and wipe counterclockwise with a soft cotton cloth;

2. Spray paint scratch repair agent to the scratches and wipe with a towel;

3. Use a touch-up paint pen to spray the position to be repaired along the direction of the scratch,

and then apply the fine wax after it is dry.