A few months back my FJ would be dead after a couple of days and had to be jumped off. I replaced the battery, which did not help. I finally decided it must be the alternator so I bought a remanufactured one. It performed almost as badly as the original. I read that the alternator could be bad and actually drain your battery when the vehicle is off. This appears to be the case with mine. While the replacement alternator does not drain as quickly as the original one, it is still going from 12.4v fully charged down to 11.9v in 5 days. I just put in a new 250amp alternator so I will see how that goes. The question is: has anyone else had this issue? What else could I check? Also, for anyone in need of changing the 2014 alternator, there is a bolt on the back side of the alternator that is nearly impossible to get to. If you take off the driver's side from wheel, remove the bolt from the brake line bracket on the frame and bend the brake lines out the way, it is possible to remove the bolt. I did not put it back.