Nope! Workshop 12 uses PETG plastics for behind the dash support material that are heat resistant and any surfaces directly exposed to sunlight are manufactured in Nylon which is heatproof to 163C/325F. Most stories of people having 3D prints melt/warp inside vehicles are using PLA as a printing material. As a reference vehicles sitting in the sun for over an hour in Arizona have dashboard surface temperatures reaching 157F on average.