Obj from maya looks very messed up

Hello! First time posting.
I’m working on a group project in school as an asset builder. For the most part exporting models out of maya as an obj/fbx and importing into unity has worked fine. However I recently finished this police car and my classmates showed me that it looks reeeally messed up in Unity. Could this be an issue caused by my being lazy and not optimizing the model enough (combining meshes, etc)?

Here’s what the car looks like in Maya compared with Unity.

Any ideas for what I could do to fix this would be greatly appreciated! Thanks!

I had very similar problems few times. Try to change the scale of the car in scene – one time it fixed my issue. You can also try to reimport the model.