Cloned and edited object disappears in live mode

I cloned a custom content car by another artist and edited the mesh so that the door would be open. When I am in build mode, the car shows up. When I go to live mode, the car disappears except the shadow is still there. The original car is just fine. I’ve done this before with no problems, but I suspect I missed a step here on accident and I am uncertain what step that would be... I’ve looked all over the internet for an answer with no luck! Any help would be very appreciated! 
I also just noticed that the cloned object is only 2,379 KB and the original object is 6,686 KB... not sure why?