If you're the owner of the car then I'd say it doesn't change - you chose to take that vehicle out on the road knowing it didn't have a way for you to control it. You can take the steering wheel off of your car with a wrench, you could build a computer to steer it for you, you're still primarily responsible as the owner.

The owner could then try to go after the company, but they're still ultimately responsible even if the company doesn't cover the cost for them