hrcs23a

I had been experiencing what this forum has described as rocks hitting the windshield and initially thought it was coming from the left A/C vent in the center stack. I was hearing a quick, annoying rattle when driving over rough road which was souring me on my first Lexus purchase. I had expected better sound insulation, and searched all of the Lexus owners' forums widely reading that other owners are having the same problem. I eventually determined it was coming from below the fake speaker grille where the dashboard meets the base of the windshield, right in the center of the dash (pressing down on the speaker grille suppressed the rattle). I went so far as to pry the speaker grille off the dashboard, exposing the hole for the optional 14th speaker of the ML stereo system (which my IS does not have). This seemed to lessen the rattle, but still it persisted often enough to annoy me. I reported this to Lexus at my 10K service appointment and the work order states that the "tech removed the dash to insulate as per Lexus" and applied TSB NV003-06 P/N-55345 30050. Apparently there is a technical service bulletin (TSB) on this problem that Lexus is aware of. I am passing this along as a reference for others who may be experiencing the same problem I was experiencing for several months. Since this fix was performed, the dash seems really tight and insulated, and I'm not hearing the annoying rattle anymore.

I had been experiencing what this forum has described as rocks hitting the windshield and initially thought it was coming from the left A/C vent in the center stack. I was hearing a quick, annoying rattle when driving over rough road which was souring me on my first Lexus purchase. I had expected better sound insulation, and searched all of the Lexus owners' forums widely reading that other owners are having the same problem. I eventually determined it was coming from below the fake speaker grille where the dashboard meets the base of the windshield, right in the center of the dash (pressing down on the speaker grille suppressed the rattle). I went so far as to pry the speaker grille off the dashboard, exposing the hole for the optional 14th speaker of the ML stereo system (which my IS does not have). This seemed to lessen the rattle, but still it persisted often enough to annoy me. I reported this to Lexus at my 10K service appointment and the work order states that the "tech removed the dash to insulate as per Lexus" and applied TSB NV003-06 P/N-55345 30050. Apparently there is a technical service bulletin (TSB) on this problem that Lexus is aware of. I am passing this along as a reference for others who may be experiencing the same problem I was experiencing for several months. Since this fix was performed, the dash seems really tight and insulated, and I'm not hearing the annoying rattle anymore.