Can't isolate small rattle under dash.

[caaront]

No big deal, nothing to do with how the car runs, I love it, and never hear on smooth or halfway smooth roads.

But the highway going to my sisters, and my church has a 4 mile stretch with a rough texture and with my OCD the rattle I hear then drives me crazy.

I drive a 2007 Yaris sedan with MT.

It is not the glove box, door panel, kick panel, etc.

I removed the glove box and the cover for the AC filter felt loose so I wrapped tape around it for testing purposes.

Stuck my hand everywhere and could feel nothing loose.

Picked up my cousin who is a genius with mechanical stuff and we drove up and down and could not isolate the rattle.

Is it something I need to learn to live with?

It sounds like it must be deep within the dash on the passenger side.

Again, its not bad, and only on roads with rough textures on the surfaces.

Once I get a manuel I'll be able to look and see what all is going on behind the dash, etc...

Thank you.