Thanks to the explanation of Nishant Samala and a free Saturday afternoon you can turn an old car into a race simulator.
Now you can play racing games with a real steering wheel and better a real car.
With the help of a device that you connect to the OBD2 port of your car, an Xbox One and some tinkering you can do it.
Click here for the tutorial and for the parts list.
You can see how that works in the video: