How can I apply for a D7 visa with a DUI from 2013?

According to the Law, a residence visa (including the D7 visa) must be refused to third-country nationals who have been convicted of a crime punishable in Portugal by a prison sentence of more than one year, regardless of whether the sentence was served or suspended.
In this case, the previous conviction should not constitute an obstacle to the D7 visa application. Under Portuguese law, driving a vehicle, with or without an engine, on a public road or equivalent road, with a blood alcohol concentration above the legally established limit, is punishable by imprisonment of up to one year or a fine of up to 120 days.
Since the maximum applicable prison sentence for this offence does not exceed one year, this conviction should not prevent the applicant from applying for a D7 visa.

A DUI from 2013 does not automatically prevent approval of a D7 visa. Under Portuguese immigration law, the key question is not the sentence you received, but whether the equivalent offence under Portuguese law is punishable by more than one year of imprisonment. “Punishable” is different from “punished.” A typical U.S. DUI generally corresponds to an offence in Portugal carrying up to one year, so it does not automatically trigger refusal.
Each case requires an individual legal assessment. We regularly support residence and Golden Visa applications through a comparative legal analysis, a tailored legal opinion for the Portuguese Consulate and AIMA, and evidence of rehabilitation, including completed penalties, clean conduct certificates, and positive social or economic contributions.
Depending on the circumstances, other legal principles may also apply, including equivalence of offences, presumption of innocence (if an appeal is pending), ne bis in idem (no double punishment), and time-barring of convictions. Several applications involving minor past convictions have been successfully approved using this approach.