A week or so I posted that I was getting a rattle when I would get over 80kms/hr. Well I looked through all the threads and checked everything and could not find it. Well today I was bored and figured that I would give it another try. I drove around trying to figure out where is was, and had no luck. So I let my girlfriend drive for a bit (she didn't want to let me back in the drivers seat) and I pinpointed that it was coming from under the driver's seat. I lifted the car up and found that one of the bolts on some sort of plastic/steel guard was not tightened all the way. The washer was rattling up and down when the wind would start to push it around.

I can drive in peace now

 

Oh and that not my car I took it from one of the posts on my350Z.com