I have the same problem with my 2006 Sienna, hariline crack in dash on the outer edge above the gauges behind the upper portion of steearing wheel going from air vent on the left all the way around the gauge panel. I am the original owner. This appeared this year when the car had about 45000 miles. We always garaged the car and used sun shade when parked outside in summer. Dealer tried Toyota warranty coverage authorization people and also Toyota regional people and looked into the possibility of Toyota wanting the dash board back for field study. No luck. I then called Toyota customer care. They basically followed standard procedure, took the words, gave me a case number, verified with the dealer about the matter. Since the dealer contacted Toyota regional people already, the guy called me back and told me there was nothing else he/they could do. This is my forth Toyota. There goes my long held conviction of high Toyota quality.