PPL blow the alts when they run their systems off the tiny toyota alt. You cant expect a lil 4 banger alt to push your 1k amp, 2 12s, chrage ur cell, run your garmin, and still power everything on your truck, at least not for long. I dont ahve any issues with toy alts. I have seen some neglect to maintain their trucks, and allow a leak to drip on them, and yes they fail. But thats the owners fault, not toyota.