At one point I read where someone stated an issue with Subaru Main Fuse Panels. The information was unchallenged, and numerous accounts of conjecture were provided by assumingly individual users of the forum where the information was presented, which seemed to further support that the flaw was present.
It seemingly effected Subaru universally; effecting all models, and platforms, for Early-00's-Late-10's MY's. The issue was regarding the main fuse panel and/or main positive terminal at the panel being a factory flaw. Excessive corrosion would cause all manner of electrical gremlins.
It was considered a major cause of the common headlight bulb failures, among other common issues.
Thank you for your time.