Ok i just bought a used 2004 g35, about 2 weeks ago....when i first got it it didnt really have it...now if im slowing down even without the brake applied at lower speeds then 30, it has a small vibration and makes alittle noise....it gets worse the slower im going. It will do it when im in gear or not and it seems to be coming from the front... it doesnt shake the steering wheel at all. So what the hell could it be?
I was thinking warped rotors or something. It got alittle better, when i filled the front tires up with alittle air.

any help id appreciate alot cause im stumped

i would think a warp rotor would vibrate even at higher speeds?

maybe some groves there

what do you mean groves...in the rotor....the rotors when i was feeling then have small minor waves going from the outer side to the center....

i dont know i think its the brakes just cause they squeal every so often so the pads need changing soon im assuming anyways and even when the brakes arent applied they still have pressure against the rotors correct?

Run your hand over the tread of the tires and give them a good look over. It sounds like you've probably got some feathering or some uneven wear.

-Jerome

+1, just do a search for "tire feathering" and you should be able to find alot of posts about it. Many people were seeing this problem with the 03-05 G's...not sure about the 06-07. Sometimes its an alignment issue from factory as it was with my car, or it could just be the michelan pilot sport tires.

++1 Sounds like some uneven tire wear to me. I'd say listen for a distinct pattern every time, that pattern will not change. Also is you have vibrations that's probably due to something else so... definitely get your front end checked if you still have some doubts.

well it does vibrate it just makes a noise of something vibrating or something