Most fluent English speakers would say "he got out of the car". That's pretty much the conventional way to say that someone was in a car and isn't in the car any more.
If you are being formal you can say "exited the vehicle". Yes, you could say he "left the car", but people rarely say that. I'm hard pressed to think of other common ways to express the idea. If you want to be more colorful or descriptive you might use more dramatic words, like "he bolted out of the car" or "he tumbled out of the car" or "he stumbled out of the car". But for just the conventional idea of, he was in the car and now he's outside the car, we almost always say, "he got out of the car".