Looking on the internet deeply has found these results:

The car door is open is the most popular phrase on the web.

The door of the car is open 1124,000 results on the web	The car door is open 1162,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
All right, that's the code that tells the car door to open. I heard the car door open... and I got tasered in the neck. I come home, the door is open, the car is gone. And he will smile, a becoming smile, but he will leave open the door of the car and offer to give you a lift. (vehicle approaches) (car door opens) Just open up the door and get out of the car. Car door's open, right? Instead, she opens the door of the car, makes the dog get in, gets in herself, and they're off.	[Shouts] All right, that's the code that tells the car door to open. (vehicle approaches) (car door opens) [Car Door Opens, Closes] I heard the car door open... and I got tasered in the neck. [CAR DOOR OPENS, CLOSES] You! [Car doors open and close]

The door of the car is open

1124,000 results on the web

The car door is open

1162,000 results on the web

More popular!

All right, that's the code that tells the car door to open.
I heard the car door open... and I got tasered in the neck.
I come home, the door is open, the car is gone.
And he will smile, a becoming smile, but he will leave open the door of the car and offer to give you a lift.
(vehicle approaches) (car door opens)
Just open up the door and get out of the car.
Car door's open, right?
Instead, she opens the door of the car, makes the dog get in, gets in herself, and they're off.