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LexusSara,
I have this same problem on my '03 ES. It only happens when the car has been sitting out in the heat and makes a ticking/creaking noise from the top of the back window while driving around. It's driving me crazy as we're now in the heat of summer. Was the dealer able to resolve the issue with your IS?
After a day sitting at work in the hot sun then using my a/c on the way home the dash will crack and pop like Rice Krispies for a few minutes. Probably expanding/contracting with the differ temps.
I have the same problem with my dash cracking and popping when I first start up the ar after a lot of direct sun. I live in Arizona, 105 - 115 past month and it really pops and cracks. It does it for about 15-20 seconds and then settles, but is anoying as hell. Anyone take this issue into a dealer yet? I read the answers about the back window, but my issue is the front.
I have the same squeaking sound from my rear side/window whatever it is..it's driving me nuts. I took it into the service dept 4 times already and all those 4 times of telling me "were confident this time it will not happen again" it has happened again. I called the service manager this time and asked him to personally take care of this matter cause I did not pay 38+ for a squeaking luxury car. He told me to come in and that he'll go for a ride with me. Lets see what these suckers say and do. On a side note...if this is gonna be my 5th time going in for the same problem...wont I be able to lemon this squeaker? I cant drive without having the music all the way up or else I go crazy!!!
TELL YOUR DEALER TO WAKE UP,THIS PROBLEM WAS DIAGNOSED RIGHT AFTER THE VEHICLE WAS INTRODUCED.THE SPACER CLIPS AROUND THE REAR GLASS NEED TO BE TRIMMED OR REMOVED.THIS TOOK MY DEALER 3 WEEKS TO DO LAST YEAR BCAUSE THEY FAILED TO CALL THEIR TECH ASSISTANCE PEOPLE EVEN AFTER I SUGGESTED IT.SINCE THE FIX I HAVE NEVER HEARD ANOTHER SOUND.
If the rear windows have the same fitment as the front windshield, the solution must be the same. There is a TSIB that applies to all Lexus models '03-'07. The TSIB number is NV005-06 Revised September 18, 2006.