THEY PREY ON HUMAN FLESH!
Corporate smuggling of South American killer bees into the United States results in huge swarms terrorizing the northern hemisphere. A small team of scientists work desperately to destroy the threat, but the bees soon mutate into a super-intelligent species that threatens the world.
I don't recall the VW Beetle bit? It could very well be(e) though. I live on a diet of this sort of stuff, so I have a hard time remembering individual moments in these movies. I do recall the vibes though, and this one I dug! :)