For whatever reason about 10 years ago, I had to replace an alternator every other week in my Xterra. 1st, Nissan under warranty, left MD stranded off road, then a Bosch, then a Napa, then Pep Boys, all remanufactured. I got so good, I could change it with my eyes closed. I got tired of trying various remans I finally got a Mean Green. Well worth the $400 premium price. After about 10 years the regulator is failing and over volting, so a new one is on the way.