One problem related to tail light has been reported for the 2005 Subaru Legacy. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Subaru Legacy based on all problems reported for the 2005 Legacy.
I want to reinforce a safety problem already reported on your list. At night, with the daytime running lights and always lit dash, it is hard to notice if your lights are on. There is a small indicator showing whether they are on, but something more is needed to remind you they are off at night. I have driven several times with no tail lights and had to be reminded by someone driving near me. This is dangerous.