Well, I kinda disagree with Nissan Tech. My 03 had the same problem, and believe me I keep up on maintenance. I always clean the terminals and post every time I disconnect for service. That corrosion kept coming back for some odd reason. Grant it, I didn't apply any terminal protection spray or anything else at first. But it seemed like every 2 months or so, I had to clean again, until it just snapped off. And yes, it is a very cheaply made part. I went to autozone and bought a universal terminal for $4.00 and haven't had a problem since. Just bust the middle nut off and the universal should fit right in. Not sayin he's wrong, but I personally believe they skimped on that particular area.