Help to set up a skeletal mesh of a vehicle from a CAD model

Hi,
I’m trying to create a skeletal mesh of a vehicle from a CAD model in Siemens NX12.0. So far I’ve exported the model to a .prt file and imported it into UE4 using the Datasmith plugin. I then created a static mesh of the whole car and exported this to a .FBX file and then imported the .FBX file to a skeletal mesh. The problem is that there is only one bone (the whole car) in the skeletal mesh and I need to set up the skeletal mesh so that the skeletal mesh has the following bones; VehicleBody, FrontLeftWheel, FrontRightWheel, SteeringWheel, RearLeftWheel, RearRightWheel.
How would I do this? Thank you!

you need to create a skeleton aka a rig for your mesh. this can be done in most 3d modeling programs such as blender, max, or maya. its not too hard of a process and theres a ton of tutorials out there that teach you step by step.