Wheels separates from car. How to solve this?

I rigged a car in blender and imported it into unreal engine but I have an issue that the wheels of the car detaches from the car and fall’s off.

Look at the image above
that is how my car looks when I stimulate it

You have to parent all 4 wheels to the car mesh in blender before exporting

Thank you. But now I’m making a car without rigging.

You do know the wheels have to be parented to the car, it doesn’t matter whether or not you are rigging it. How else is the game suppose to know that the wheels are tied to the car unless you parent them.
PARENTING IS NOT ONLY FOR RIGGED CARS. PARENT THE WHEELS end of discussion.
Shift select all 4 wheel objects then select the car base model last, then press ctrl p to parent them to the car. Export and end of story.