Our 2001 Audi and many other cars like it have plastic headlights that perform well for several years. Then in any sunny location like the us southwest they begin to fog up and become progressively more opaque. This results is more light scatter using the headlamps at night: The headlamps no longer Focus a narrow beam of light on the roadway ahead. Due to fogged, opaque head lamp light scatter visibility is reduced putting especially pedestrians and bicycles at risk while driving at night. Also, oncoming traffic experiences greater nighttime glare from fogged headlamps increasing accident risk. Often, replacement costs for new plastic headlamps are prohibitive - at times more than the cost of a used car. Many us drivers thus drive with fogged up, opaque headlamps. Previously glass headlamps delivered many decades of reliable service without ever fogging up as do the windows of any older car. I believe the NHTSA should investigate and consider issuing a safety recall.

- San Francisco, CA, USA

2001 Audi A6. Left headlight assembly wires shorted against frame and ignited a fire. Car was parked and off. Headlight switch in off position. Car was inspected for electrical leaks the week prior.

- Irving, TX, USA