jax330

I will try that test tomorrow. Are you saying that the harmonic occurs when the sunroof AND one or both of the rear windows are open. I am not experiencing the problem when the sunroof and any of the four windows are open. Only when the sunroof is open fully. Have you heard of anyone else having the problem or a technical service bulliten being issued because it is quite severe in my case. Thanks

Just purchased a RX330 with a sunroof and I am experiencing a harmonic problem from 30-60 mph. The problem occurs when all the windows are rolled up but the sunroof is open. There is a horrendus harmonic wave above your head that sounds like a helicopter. It will give you a terrible headache in 2-3 minutes. Has anyone experienced this and if so what resolved the problem? Thanks