The headlights of Nissan Altima use reflective assemblies that are defective. Headlights tend to become dim when their reflective surface is dull. In this situation, police may catch the drivers for headlight issues. Also, dull headlights are the reason for crashes during the drive.

2006 Nissan Altima headlights face this issue and it is more dangerous while on a long drive.

There are many reasons for a dim headlight.

1) Bulb burnt out – Burnt out bulb is one of the common issues for a dim, burn-out, or dying headlight. In this scenario, the simplest solution is bulb replacement. Like how the lightbulbs in-home get worn out and replace once in a while, the headlight bulb also needs to be replaced. Apart from noticing a dimmer headlight than the usual way, you can check if the bulb is burnt out in the following steps:

a. Just need to park your vehicle in a place and turn on your headlights.

b. Get out of your car and check that both headlights are functioning and burning out bright.

c. In case you see one or both the lights dim, then go in for a bulb replacement service.

2) Lens Oxidation – Sometimes, headlight dimming is not always due to burn-out bulbs. The issue can be due to some lenses. Headlight lenses are the plastic pieces that are seen covering the bulbs. It is made out of acrylic. The chemical in this material reacts with the sun’s UV rays. After some days the lenses might get oxidized and lead to cloudy, foggy, or might get the yellow colored appearance. Oxidation causes opaque shade and does not let much light through like the clear lenses. This oxidation causes the car headlights to look dim, even though the bulb is new. In such a scenario, take the car to the mechanic who can address the lens oxidation issue and protects your headlights from dimming.

3) Trouble in wiring – The headlight bulb is illuminated by many electrical components. In most cars, it contains a fuse and wiring harness. These components are responsible to provide the power required to charge the headlights. In case there are wiring troubles, it can cause the headlight to dim, stop working, or misfire. Wiring issues are mostly a rare case, but they can occur. It can also happen in case you have tampered with the headlights or happened to repair some of its parts by yourself. In case, there is a wiring issue, you need to check the exact nature of the wiring issues. Sometimes, you may require to go in for a wiring replacement, a fuse replacement, a new wiring harness, or fix another electrical repair. Take it to a car mechanic who can detect the headlight troubles and fix them.

4) Bulb Type – The bulb types make a lot of difference. Whether it is LED or incandescent bulbs it makes a difference in their output. Some LED headlights can burn brighter than older bulb versions. If the headlight carries incandescent bulbs, it might seem dim as compared to LED. Traditional lights have a warmer, softer, and yellow hue, while LED lights emit sharp white light along with blue tones. This color seems to be harsh on the eyes, however, it contrasts more bluntly in dark. As such, LED headlights are brighter than incandescent bulbs even though both emit the same amount of light. The brightness of the light depends on other factors like vehicle model, headlight lenses, etc. Before you decide on bulb type, you can take it to the car mechanic and find out various bulb options that are suitable for your car model and choose a better option.

5) Configuration – These days, all vehicles have many lighting options to chose from. Drivers can choose the lighting options from the panel. In case your headlight is dim or not working, check the settings. Most of the current headlights automatically adjust to the default settings unless it is configured. Most vehicle drives might forget to set the settings. Adjust the settings so that headlight brightness is set right. Also, there is a chance that there are fox lights instead of the standard headlights. In such cases, all you need is to just adjust the headlight settings and it works fine.