1, color difference: the door and fender are composed of different parts, and different parts may have different colors, resulting in inconsistent colors of the door and fender.

2. Sunburn: Due to sunlight, the color of the car surface may change slightly, making the colors of the door and fender look inconsistent.

3. Repair marks: If the door or fender is repaired, it may lead to inconsistent colors.

4. Production problems: In rare cases, there may be a problem that the colors of the door and fender are inconsistent during the production process, which may be caused by some factors in the production process.