The lampshade and the sealing strip of the car headlight are bonded with snake glue, or snake disc glue, butyl sealant. The lampshade and the sealing strip of the car headlight are bonded with a special sealant. The quality of this sealant is very important, otherwise rain and dew will form fog in the headlights after entering and cannot be removed directly.

Replacing the headlight shade is cumbersome, and the owner needs a certain amount of hands-on ability to replace it by himself. Remove the headlight assembly, and then use a hot air gun to heat and soften the glue to ensure tightness. If the lampshade is broken, it is best to replace the headlight assembly, because replacing the lampshade alone does not ensure its tightness.

For BMW M3 Tail Light V2 2013-2020 year

Since the headlights are responsible for the lighting work of night driving, it can be said that the headlights are equivalent to the eyes of the car.

Secondly, high-quality light bulbs have good light distribution and high brightness, while inferior light bulbs have insufficient brightness, lack of focus, and short range. When overtaking, it will cause the driver to have visual illusions and be prone to accidents.

In addition, due to the poor sealing of low-quality lamps and lanterns, water is easy to enter in rainy days or when washing cars, which will cause fog in the lamp, and in severe cases, it will cause a short circuit and fire.