Please help me. I have a strange rattle, I can't find it.

[Sigh-on-Rice]

For the record:
Noise I'm hearing = Sounds like a small stone is dropping on top of the trunk.
1) I tried stuffing a towel in between the glass and the 3rd brake light so that it's like someone pressing down the 3rd brake light, but the noise didn't go away.
2) I tried removing the license plate frame just to make sure it's not that, and the noise didn't go away either.
3) I tried taping the emergency trunk open lever, but the noise didn't go away.

The noise become higher pitched when I put the rear seats down, so I'm pretty sure it's coming from either the bottom of the rear dash or somewhere in the trunk.

[Norkoastal]

Originally Posted by Sigh-on-Rice

For the record:
Noise I'm hearing = Sounds like a small stone is dropping on top of the trunk.
1) I tried stuffing a towel in between the glass and the 3rd brake light so that it's like someone pressing down the 3rd brake light, but the noise didn't go away.
2) I tried removing the license plate frame just to make sure it's not that, and the noise didn't go away either.
3) I tried taping the emergency trunk open lever, but the noise didn't go away.

The noise become higher pitched when I put the rear seats down, so I'm pretty sure it's coming from either the bottom of the rear dash or somewhere in the trunk.

I attempted to make this fix a couple days back.. I noticed a few areas that seem like possible noise generating culprits...

The plastic piece mentied a few posts back seems to be an area that can be addressed... Its basically held to metal with six plastic tabs, but has lots of play which could "tap" when the car flexes.

The second area of concern was from the passenger rear air bag section. A portion of the wire rests on the metal body and could tap if the car is bouncing around..

I ended up only adding Raam mat to most of the metal deck, the keyfob transmitter area, the soft cover in a couple sections, and behind the airbag loose wire noted above. Overall this change helped lower overall noise from the back, reduced rattle from my 10-inch sub, and tightens up the bass. I will try to sneek some more matt on the plastic "frame" pieces that surround the opening to see if they "tap" any less.

Keep on it guys, we will find all the "tap" sources sooner than later..