Where there's smoke ... TMZ has learned, Ex-Disney star Jake T. Austin was busted for DUI just last month in the SAME CAR that was involved in the 4-car hit-and-run crash this morning.
Law enforcement sources tell us, Austin was arrested October 8th by the CHP after being pulled over for driving at night without headlights. We're told police officers smelled booze as they approached his vehicle, administered a field sobriety test and Austin did poorly.
According to sources, 18-year-old Austin blew a .08 and was arrested. He has since been charged with DUI and has a court date scheduled for TOMORROW.
At the time he was busted, Austin was driving the 2010 Audi with New York plates -- the same car that slammed into multiple cars early this morning.
The driver allegedly threw a vodka bottle out of the car and then left before cops arrived. There's no way cops can arrest the driver for DUI, but it's definitely a case of felony hit-and-run.
An eyewitness just told us on TMZ Live ... she is "100%" that the driver of the hit-and-run is Austin. She says other witnesses are just as sure.