Just purchased a used '04 G35 Coupe a little over a week ago from carmax. After two days of driving I noticed the brakes squeaking like the low pad indicator was activating. So, I took it back to carmax and they fixed it. Said it was a corroded brake shim causing the issue. Now it's been a week and tonight the squeaking while breaking under 5mph started again. It's still under warranty, so I'm not worried about having to pay for it to be fixed, but I would like to go in there with a list of things for them to check since obviosuly they weren't that thorough.

Lil help?