Algodoo

make it run off an engine, and I'll rate. oh, and the suspension is waaaaay too loose. Good otherwise

Wow you are nice Wow !!!!

PLEASE use the grid ALL THE TIME when you're making your scenes. Your rims are too crappy for a breakable car, as the car can break from the vibration. Here's what I think you should add:
-new rims made with grid/from someone else
-faster acceleration (Maybe you'll need a frame, if that's the case just forget it)
-more realistic suspension and stronger body for that purpose

Nothing more. making a breakable car run off an engine is quite hard, ngphil, so I wouldn't suggest that right now

Add more springs in the struts to fix your weak suspension problem,
remove the no-self-collide from the hood,
make the crumple-zones weaker/ the safety shell stronger,
make the suspension collapse in a crash.
also the windows are white.