What is a common reason for headlight failure during inspection?

One of the most common reasons for headlight failure during inspection is burned-out bulbs. Headlights are crucial for visibility and safety while driving, as they illuminate the roadway and make the vehicle visible to others. Over time, the filaments in incandescent bulbs can wear out, leading to a complete loss of light output. Similarly, halogen bulbs can also fail after extended use due to their internal components deteriorating.

Inspectors will typically check the functionality of headlights during an inspection. If a bulb is burned out, it will not produce any light, making it a straightforward cause for failure in this critical safety component. Addressing this issue is usually as simple as replacing the bulb, which is an important part of routine vehicle maintenance.