Adverse consequences of Felony DUI convictions are far reaching, and can last a lifetime.
In Arizona a person convicted of a third or subsequent DUI within 7 years or 84 months will be found guilty of Aggravated DUI, Class 4 Felony charges. Felony DUI convictions are very serious and will result in harsh sentencing including at least 4 months in State Prison.
A first offense DUI is generally charged as a Class 1 Misdemeanor, which calls for jail terms, but not prison. There are several aggravating factors under Arizona law that can elevate a Misdemeanor DUI to an Aggravated DUI. One of those factors is to be found guilty of a third DUI within in 84 months.