Rattling/Buzzing sound while accelerating (with video)

[acoupe08]

I have an Altima Coupe 08 2.5S with about 55k miles.

This problem started about a month ago. There is a rattling, buzzing sound while stepping on the accelerator. It seems to go away when I let go of the accelerator. It seems to come randomly and not all the time. The only time I can hear it consistently is driving up my driveway on a slight slope. See video. Anyone able to help me pin point the source. Thanks!

[youtube]http://www.youtube.com/watch?v=2jIAc9dMPzc[/youtube]

[lecros101]

That sounds bad, I would definitely take that in to the dealer

[DJ_B_Easy]

That sounds bad, I would definitely take that in to the dealer

Agreed.

[ea_da_king]

That sounds bad, I would definitely take that in to the dealer

Agreed.

+1 Agreed...

[wade001]

yah, thats not good. take it to the dealer before it possibly gets worse.

[Jman0711]

Yea that def doesn't sound good, it could be something small like a heat shield, but i wouldn't risk at and take it in. Cars pretty new shouldnt be making loud rattling like that.

[Ranga14]

Sounds like the exhaust might have come loose perhaps and is rattling around in the engine bay. Any check engine light?

[LongBeachCoupe]

some sort of belt vibration or cat/exhaust related