I saw mention of a Special Service Campaign on Edmunds. It sounds different from this issue. I wonder if it is the same noise I heard during test driving recently.

Exhaust Manifold Converter Replacement

"On certain early (doesn't give any dates) 2004 Model Year RX 330 vehicles,
due to a manufacturing error in the two exhaust manifold converter assemblies,
an abnormal noise could be generated from the exhaust system."

 

I believe it's the same thing - there's only been ONE recall on the RX330 and it's this one

funny - just received my notice today (7/17) in the mail about the recall - I had it fixed over a week ago thanks to the heads-up from this post

 

Thanks for the registration link.

RickC