Depends, TFT is not new to harsh conditions. Used in race cars, off road machines, excavating equipment, farm machinery etc. The quality of components used inside and the construction criteria and the quality inspection may have an influence on the robustness of the TFT that BMW uses. Wonder if it is their own or manufactured by 3rd party specific for this application. Engineer is the man to ask. He will know more about processor life and pcb/smt issues when subjected to temp changes, environmental conditions and vibration. Or look at it this way, smartphones are subject to some harsh conditions and it does ok.