What causes tail light failure on a Toyota 2001 Avalon?

Tail light failure on a 2001 Toyota Avalon can be caused by several factors, including burned-out bulbs, faulty wiring, or a blown fuse. Corrosion or damage to the bulb sockets can also lead to poor electrical connections. Additionally, a malfunctioning tail light relay may prevent the lights from operating properly. Regular maintenance and checks can help identify and address these issues early.