Um.. you COULD, but you'd be splitting money (cyberware, etcetera) and skill points(compiling and driving) versus stuff.. and remember, the stuff has to be online for you to Techromance in (my word for what the Otaku 2.0 do
) and start it up. Any car worth stealing probably has a good anti-theft program, etcetera
Edit: Now that I think about it, most of the stuff is "dead metal" except for the anti-theft stuff when shut off. Means you can't get in until something (like a key or an access code) has "woken it up"