PLA is not suitable for anything that sits in a car or direct sunlight

PLA glass transition temperature is 55-60°C. A car dashboard in summer reaches 70-90°C. PLA parts will warp, sag, and deform. For any application involving heat or UV exposure, use PETG (glass transition 80°C), ASA (100°C), or ABS (105°C). PETG is the easiest to print and the best general-purpose alternative to PLA when durability matters.