Replacing the car headlight assembly usually occurs under the following circumstances:

　　Lamp shell damage: If the lamp shell of the headlight is cracked, it may cause moisture to enter or fog, affecting the lighting effect and safety.

　　The light is dim or not bright: When the light of the headlight becomes dim, it may be due to the aging or damage of the internal components. At this time, it needs to be replaced in time to restore the normal lighting function.

　　Lamp housing aging: Over time, the headlight housing may age due to long-term use, which may also be one of the reasons why it needs to be replaced.

　　Light decay phenomenon: that is, the luminous flux of the lamp gradually decreases over time, which is also a signal that the headlight may need to be replaced.

　　Damaged light bulb: If the light bulb no longer works, whether because of burnt out or other reasons, it needs to be replaced with a new one.

　　It should be noted that if the headlight bulb only does not light up, it is enough to replace the bulb in this case, and there is no need to replace the entire headlight assembly. In the above-mentioned situation, if the headlights are not replaced in time, it may cause serious traffic safety hazards. In addition, although replacing the headlights may affect the vehicle's value preservation rate, it is more important to ensure driving safety. Therefore, once the above-mentioned problems are found in the headlights, they should be replaced in time.

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