The exterior parts we prototype include bumpers, headlights and tail lights, and door handles. Exterior part prototypes are generally tested for safety, such as how the bumper holds up in a simulated crash, how the lights perform in low light or rain, or how the door handles function with repeated use. Safety testing, such as failure mode and effect analysis (FMEA), can also be performed on exterior parts to evaluate the risk of failure in both everyday use and extreme conditions.

The functional parts that we can prototype include air components, engine covers, and air filter housings. Functional part prototypes are primarily tested to ascertain how well they perform within the vehicle. For example, the air components, engine covers, and air filter housings can be prototyped and tested to see how they function in the high-temperature environment generated by the engine.