We're told Koechner's case is due in court in a few weeks, and each count carries a possible penalty of up to 6 months behind bars. The reality ... first-time offenders almost never do time, so he'll almost certainly get probation and a mandatory alcohol ed course.
As we reported ... police were tipped off after they got a call that an erratic driver allegedly hit a street sign with his car. Cops found him and say he failed the field sobriety test. He was arrested and booked into the Ventura County Jail.