Aside from a 4th or subsequent DUI within 10 years, a DUI can also be a felony when an accident occurred. A felony accident DUI is charged when the drunk driver was negligent or violated a traffic law, and injured another person even slightly. The potential sentence includes attending an alcohol or drug program for 3-9 months and a $390 to $1,000 fine, plus penalty assessments of an additional 180% of the fine, and a 1-year license suspension by the DMV which can be loosened to a restricted license with an ignition interlock device.
If probation is granted, a potential sentence will include between 5 days and 1 year in jail, plus a 1-year license suspension. If probation is not granted, a potential sentence will include up to 3 years in state prison.
Your vehicle may also be impounded for 6 months, and you will be required to have a ignition interlock device on your car for 12 months.