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Minnesota does not use one lookback period for every DWI consequence. The criminal aggravating-factor rule generally looks at qualified prior impaired-driving incidents within ten years. Important license and ignition-interlock provisions use a 20-year period for one prior incident and broader rules for multiple priors. An old DWI does not automatically stop mattering after ten years.
This guide separates those rules so you can ask the right questions about a new DWI, also commonly called DUI. For individual advice, see our Minnesota DWI defense services.
What is the ten-year rule for a Minnesota DWI charge?
Under section 169A.03, subdivision 3, a qualified prior impaired-driving incident within the ten years immediately before the current offense is an aggravating factor. Aggravating factors help determine the degree of a new charge.
That is different from saying all criminal consequences disappear after ten years. Section 169A.24 has separate felony provisions, including prior felony DWI and specified other felony convictions. Those provisions must be checked even when an older event is outside the ordinary ten-year aggravating-factor window.
Where does the 20-year rule apply?
Section 171.178 addresses license revocation and reinstatement. Its test-failure and test-refusal provisions distinguish no qualified prior incident within 20 years from one within 20 years, and also address two or more qualified prior incidents without the same 20-year limitation.
Subdivision 8 sets related ignition-interlock and treatment requirements. Do not use the criminal charge’s degree alone to predict how or when unrestricted driving privileges can be restored. Incident dates, the type of license action, and the complete history matter.
Can a DWI from 15 years ago still affect a new case?
Yes, particularly the license analysis. In a simplified example, one qualifying incident 15 years before a new offense is outside the ten-year prior-incident aggravating-factor window but within a 20-year license window. That difference can matter even if there are no more recent incidents.
This example does not determine a specific charge or reinstatement date. A prior felony, additional incidents, out-of-state records, or other aggravating facts require further analysis. Counsel should apply the law governing the actual incident rather than a generic “second offense” label.
Does only a prior conviction count?
No. A qualifying impaired-driving-related license loss can also matter. Section 169A.03 defines both prior impaired-driving convictions and impaired-driving-related losses of license. A count based only on remembered convictions may therefore be incomplete. The definitions also address qualifying out-of-state matters.
Obtain the actual records and dispositions. An arrest, a charge, a conviction, and an administrative license action are different events. Their labels alone do not establish whether they qualify under the relevant statute.
Can one old stop count twice because it caused a conviction and revocation?
The same course of conduct is not counted as two separate qualified prior incidents merely because it produced both. Section 169A.09 provides that either the qualifying conviction or qualifying license loss may count, but not both, when based on the same course of conduct. Section 171.178 expressly uses that counting rule.
A careful chronology should connect court dispositions and license records to the incident that produced them. This helps distinguish a genuine additional incident from two records of the same event.
Does an old DWI disappear from your record after the lookback period?
No automatic record erasure follows from the expiration of a particular lookback window. The window answers whether an event counts under a specific provision. It does not, by itself, resolve record retention, background checks, expungement eligibility, or how another statute treats the event.
Ask separately about the current criminal charge, current driving privileges, and the historical record. Treating all three as one question can produce misleading answers.
What documents help resolve your prior-DWI history?
- Dates and jurisdictions of every potentially relevant incident.
- Complaints, judgments, sentencing orders, and final dispositions.
- License revocation, cancellation, disqualification, and reinstatement records.
- Out-of-state documents and any order rescinding a license action.
- The new complaint and current license notices.
Current law includes recent amendments. Section 171.178 flags a 2026 change to subdivision 5; the governing version and effective date need checking before calculating a specific outcome. Our license-review guide explains why the civil process must also be addressed separately from criminal court.
Talk with a Minnesota DWI defense lawyer
Request a free criminal-defense consultation with Martine Law. Minnesota criminal defense is provided by Martine Law PLLC. Phones and chat are answered 24/7, with AI covering when no staff is free.
Prepared October 14, 2026. General information about Minnesota law; advice requires review of your incident date, records, and individual circumstances.
