Physics problem with custom car

HiI try to run my own car that is exported from the blender, but always behaves strangely physically. Constantly leaning to one side.
The vehicle is never aligned horizontally with the ground. Does anyone know what the problem is?

I tried exporting the default vehicle, which is in the unreal engine (Sedan) to the blender and back, where it was working fine again after reloading into the UE.

In blender, I tried to change the origin on my own, but always the vehicle just leans differently. But now the model is precisely around [0, 0, 0], which can be seen in the attached picture where the box surrounds the vehicle around [0,0,0]. Thank you very much for your advice.

Origin on 3 image is cube origin.