How often should headlight assembly be replaced?

That's a great question about headlight maintenance! Headlight assemblies don't have a fixed replacement schedule like oil changes, but they typically need replacement when they become cloudy, yellowed, or damaged. Most modern headlight assemblies last 5-10 years before they start showing significant deterioration from UV exposure and weather conditions.

You'll know it's time for replacement when your headlights appear dim even with new bulbs, have visible cracks or moisture inside, or the plastic lens is so hazy that it reduces your nighttime visibility. Some signs to watch for include reduced light output, yellowing of the plastic, or condensation buildup inside the assembly.

If you notice any of these issues, it's definitely time to consider replacement to maintain safe driving conditions, especially at night!