The tail lights on your car are essential for your safety and the safety of those around you. Brake lights are one of the most important features of the lighting system, as they let other drivers know when you're slowing down or stopping. When your used tail lights start to dim or become yellowed out, it can be a major hazard to all other drivers on the road. This is why it's essential to never ignore a faulty car tail light, and why it's a good idea to invest in a used tail light assembly if yours is broken or old.