What Causes Headlights to Turn Yellow?

1 Answers
Jerry
07/29/25 5:45pm
Headlights turn yellow due to prolonged exposure to air, high temperatures, UV rays, and oxidation, which cause the headlight covers to age, resulting in yellowing and cracking. Here are some maintenance tips for car headlights: Replacement: Ensure the headlights remain well-sealed, especially to prevent contamination or damage to the reflector coating. When replacing bulbs or diffuser glass, avoid touching the lens with your fingers to prevent leaving sweat or oil marks, which can dull the reflector and reduce its efficiency. Regular Inspection: Periodically check and adjust the headlight beams to ensure the illumination distance meets requirements and the beams are uniformly aligned. The diffuser glass should be correctly installed as specified to prevent loosening or misalignment and to maintain proper prism orientation.
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