Ok - I know that there are a million posts on the RX330 dash rattles. Mine started today - the day after I hit 20k miles. It's definitely inside on the drivers side when I'm driving. I put my hand on everything I could safely reach while moving - the speaker cover, the gauge covers, dash, stalks, steering wheel base.....everything. I'll have Lexus look at it next week when they look at my breaks. It's also loud - audible with the speaker volume at 20+. Bummer..... :cries: