Underbelly rattle/heat shield noise

[2005 RX330]

On a recent oil change with my local mechanic, they soldered a section of the heat shield because it was loose. I had a noise before but now it is much worse. Anyone have issue with the underbelly shields? I had a huge issue with the gas tank shield a few years back that would make an unbearable noise on the highway before they located the cause.

[lenore]

The only issue I have heard of is the Gas tank plastic shield rattling against the body, easily fixed.  As for other shields maybe your exhaust hangers are stretched or some broken allowing too much movement.

[2005 RX330]

Finally went to the dealership which is my last resort.....they replaced the y-pipe heat shield clamp for a tune of $122.00. Always walk out feeling completely ripped off. I know that clamp was under $10. The noise is gone now and it had gotten much worse. I just noticed another site called ClubLexus that identified this issue.