Bought my G35 about two months ago. Two very annoying rattles. There is a rattle coming from the defrost vent on the dash. Rattles worst when it is cold. Goes away when you push on it, dealer hasn't been able to get rid of it. Second rattle is on the passenger side back seat area near headrest. Seems to be coming from area right behind window. Dealer also unable to locate rattle (but can hear it). I love the car but rattles are driving my nuts. Anyone have any similar issues or advice on ways to deal with it?

 

You can take apart your dash and backseat if you really want to get rid of those rattles.

Twilight Blue G35 Coupe 6MT
Premium - Nav - Aero - Trunk Mat
Injen CAI

 

When I thought I heard rattles in my back seat...both sides...turned out it was the seatbelts hitting the sides of the car...solution...I just plugged the two seatbelts into their holders...forgive me cause I feel like a retard for my lack of words right now...but do you know what I mean...? connect the seatbelts to where they should go and just leave them like that...I hardly have anyone in my back seat anyway...

"Operator, give me the number for 911!"
- Homer Simpson

 

and I have the same one on my dash too...can't get rid of it...let me know if you find a fix for it...

"Operator, give me the number for 911!"
- Homer Simpson