In Michigan, a first offense DUI, also known as OWI, can lead to fines up to $500, a 180-day license suspension, vehicle immobilization, six points on your driver's license, community service, probation for 3 to 12 months, and mandatory alcohol education programs. While jail time is not mandatory for a first offense, it's crucial to have a knowledgeable attorney to minimize the impact of these potential penalties.