On the inside is an unusual mixture of incandescent bulbs and plastic light guides. The black-coated blocks of plastic on the left (shown from the rear) act as light guides. The holes are for ...

If the plastic is foggy or has a dingy yellow tint to it, it's time to restore the headlight. Check both bulbs to see if the inside of the ... and LED (Light Emitting Diode) bulbs will dim ...