Just started having a rattle when engine in under load during slow acceleration. Especially occurs under load like up hill. Definitely coming from the front like deep in the dash or maybe engine compartment. Can't recreate it with varying engine RPM in park. Hoping someone else has had this and knows just what it is. Reverberates through the whole vehicle.

 

The RDX clearly has issues with dash noises and rattles. Thats a given. But your topic sounds more mechanical related? Elaborate a little more if you can.

 

I figured it out. Heat shield next to catalytic converter was bent and rattling against exhaust.

 

what an odd thing to happen... wonder how it ever got bent..