We use ANSYS for multi-physics FEA simulations in order to validate of the desired functionality of mechatronic systems from an early stage. This allows the development of suitable structural components satisfying all requirements, identifying and avoiding potential stress points in the process. For example, to ensure the reliability of an electrical subsystem installed at critical a location, where it is exposed to high levels of mechanical and/or thermal stress, detailed models are verified using the CAD system and heat flow simulations in ANSYS, avoiding thermo-mechanical stress and component failure.