The dealer removed a radio system from a new IS300 and replaced it, with what was after all, a defective unit. The sound system works again and I hope it will continue to run trouble free.
It seems that this is an unusual problem and does not reflect on the overall quality of the car - which is excellent. My wife traded a 2000 BMW 3 series for this car which had a Harmon-Kardon Sound upgraded sound system. The sound from the Lexus is very superior to that system. In fact I would have to say that the sound is the best I have ever heard in a car!
Also, this car gives a super "tight" drive and overall I give it top marks - higher than the BMW which after driving the IS300 seemed a little like a river boat - (I know river boats because I own a 1999 DeVille)
If I had to judge this issue, the only complaint I would have is the time it took to get the amplifier module - 10 days - which I find excessive. (What happened to Overnight Shipping)
Things happen - and in this case they did - but I must say the IS300 is fantastic car.