Jake T. Austin -- Ex-Disney Star Arrested Last Month for DUI in SAME CAR

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.