What is this for?

Is that a drive-by-wire throttle body? If so, hope it doesn't go Toyota on you. Most new cars have had them for the last 5 years. I expect it goes thru the engine computer. I would rather have a dedicated control box between the pedal and throttle, but I don't think they do that. I just hope when you turn off the key, it really kills the ignition and isn't just a "please turn off" request to the computer.