Minnesota DWI degrees — what's the difference between 1st, 2nd, 3rd, and 4th degree?

Minnesota's 4-degree DWI classification system (Minn. Stat. § 169A.20 et seq.): (1) 4th Degree DWI (Misdemeanor): impaired driving with NO aggravating factors and no prior DWI history within the past 10 years. A first-time DWI with BAC .08%-.15% and no child in the vehicle or other enhancements is typically a 4th Degree DWI. Maximum: 90 days jail, $1,000 fine. Minimum: no mandatory jail on a first 4th Degree without enhanced factors; (2) 3rd Degree DWI (Gross Misdemeanor): one aggravating factor present OR first DWI with BAC .16% or above. Aggravating factors include: BAC .16% or higher; test refusal (breath); child under 16 in the vehicle at the time; prior DWI conviction OR prior DWI license revocation within 10 years. Maximum: 1 year jail, $3,000 fine. Mandatory minimum: 30 days (can be served as 30 days' electronic home monitoring); (3) 2nd Degree DWI (Gross Misdemeanor): two or more aggravating factors. Maximum: 1 year jail, $3,000 fine. Mandatory minimum: 30 days (including at least 48 hours in jail); enhanced license revocation; vehicle subject to plate impoundment and potentially forfeiture; (4) 1st Degree DWI (Felony, § 169A.24): triggered by: (a) 3 or more aggravating factors; OR (b) 4th DWI within 10 years; OR (c) prior felony DWI conviction (regardless of when). Maximum: 7 years prison, $14,000 fine. Mandatory minimum: at least 180 days of imprisonment (significant portion can be served in workhouse or home electronic monitoring depending on circumstances); (5) Aggravating factors again: the 4 aggravating factors are: (i) BAC ≥.16%; (ii) test refusal for breath; (iii) child under 16 in vehicle; (iv) prior impaired driving within 10 years. Stacking multiple aggravating factors increases the degree.

Minnesota criminal test refusal — is it better to refuse the breath test?

Minnesota's criminal test refusal law (§ 169A.20(2)) — and why the calculus is different from other states: (1) The criminal refusal rule: in Minnesota, refusing to take a breath test after a lawful DWI arrest is itself a crime — the same degree as the DWI you would face. Unlike Wisconsin (where refusal triggers a civil revocation but is not a crime) or Colorado (where refusal results in administrative revocation and is not separately criminal), Minnesota makes refusal a criminal act; (2) Breath test refusal only: following Birchfield v. North Dakota (2016) and State v. Thompson, 886 N.W.2d 224 (Minn. 2016), criminal refusal applies to BREATH test refusal only. A Minnesota driver can refuse a blood draw without facing criminal refusal charges — blood draws require either consent or a warrant. The officer can seek a telephonic warrant for a blood draw in cases involving injury, fatality, or other circumstances justifying blood testing; (3) The strategic dilemma: a Minnesota DWI suspect must decide: take the breath test (providing the prosecution direct BAC evidence) OR refuse (facing criminal refusal charges AND the administrative consequences of refusal). There is no safe harbor of 'refuse and face only civil consequences' as in some other states; (4) Administrative consequences of refusal: in addition to criminal refusal charges, refusing ANY chemical test (breath or blood) in Minnesota results in administrative revocation of the driver's license — the same civil revocation that comes with a DWI conviction. For breath refusals, both criminal charges and administrative revocation apply; (5) When refusal might be considered: defense attorneys sometimes discuss refusal in cases where the driver believes their BAC is extremely high (significantly above .16%, which triggers enhanced penalties) — a conviction for refusal may carry a lesser sentence than a conviction for DWI with a very high BAC. But this calculus is highly fact-specific and requires immediate legal counsel; (6) Implied consent advisory: Minnesota officers are required to read an implied consent advisory to any driver arrested for DWI, explaining the consequences of testing and refusing. The advisory must be read before the test demand. Failure to properly read the advisory can affect the admissibility of the test result or the validity of refusal charges.

Minnesota 'whiskey plates' — what are they and how do they affect DWI defendants?

Minnesota license plate impoundment (Minn. Stat. § 169A.60): (1) What triggers plate impoundment: a Minnesota court must order license plate impoundment (the seizure of the defendant's vehicle's regular plates and issuance of 'W' plates) when a person is convicted of: 2nd, 3rd, or 4th DWI within 10 years (i.e., a repeat DWI within the look-back period); or certain other DWI circumstances involving high BAC or test refusal; (2) What 'whiskey plates' are: the impounded regular plates are replaced with special Minnesota plates that begin with the letter 'W' — distinctive white plates with the 'W' prefix. In Minnesota, 'whiskey plates' is the common term for these plates. The visual marker on the vehicle signals to police (and other drivers) that the vehicle is owned by someone with a DWI history; (3) Practical enforcement effect: when a vehicle with 'W' plates is stopped, Minnesota officers are immediately aware of the plate's significance. A 'W' plate vehicle operator is more likely to be asked for license and registration promptly, and any suspicious driving is more likely to result in DWI investigation; (4) Third-party impact: 'W' plates apply to the VEHICLE, not just the owner. If a DWI-convicted person's spouse or other household member uses the same vehicle, that person must drive a vehicle with 'W' plates even though they have no DWI history — creating significant social and practical consequences for the entire household; (5) Plate cancellation: 'W' plates can be removed after the required impoundment period and compliance with reinstatement requirements. The required period depends on the conviction level; (6) Vehicle forfeiture: in addition to plate impoundment, certain Minnesota DWI convictions (particularly 1st Degree felony DWI) trigger vehicle forfeiture — the state can seize the vehicle used in the DWI offense.

Minnesota DWI penalties — what's the minimum and maximum for a first offense?

Minnesota first-offense DWI consequences (4th Degree DWI with no aggravating factors): (1) Criminal penalties: maximum 90 days in jail and a $1,000 fine. For a true first offense with BAC .08%-.15% and no aggravating factors, the defendant typically receives a stayed sentence with probation — meaning the jail term is suspended if probation is successfully completed. Active jail time for a first-offense 4th Degree DWI is uncommon unless there are strong aggravating circumstances beyond the legal minimums; (2) License revocation (administrative): separate from the criminal process, the Minnesota DMV (Driver and Vehicle Services) imposes an administrative revocation of the driver's license for 90 days for a first-offense DWI (or 1 year if BAC ≥.16%). The administrative revocation begins quickly — typically within days of the test — and is separate from any court-imposed suspension; (3) Ignition interlock: Minnesota requires an ignition interlock device (IID) for reinstatement of driving privileges when: the BAC was .16% or higher; or the driver refused testing; or the driver has a prior impaired driving record. First offenders with BAC .08%-.15% may reinstate without IID after the revocation period; (4) Plate impoundment: first-offense 4th Degree DWI does NOT trigger mandatory plate impoundment. Plate impoundment requires a repeat offense within 10 years or certain enhanced circumstances; (5) Alcohol assessment: Minnesota requires a chemical use assessment for DWI offenders to evaluate alcohol dependency. The results can lead to mandatory treatment as a condition of probation; (6) Insurance (SR-22): a Minnesota DWI results in a driver's license revocation — upon reinstatement, Minnesota requires proof of financial responsibility (SR-22 form filed by the insurer) for 3 years. DWI significantly increases auto insurance rates; (7) High BAC (.16%+) first offense: a first offense with BAC ≥.16% escalates from 4th Degree (misdemeanor) to 3rd Degree DWI (gross misdemeanor) — mandatory minimum 30 days (can be home monitoring), 1 year license revocation, mandatory IID for reinstatement.

Minnesota DWI and cannabis after legalization — what does impaired mean?

Minnesota cannabis DWI in the post-legalization environment (effective August 1, 2023): (1) Impairment standard: Minnesota DWI law (§ 169A.20(1)) applies to driving while impaired by: alcohol; controlled substances; intoxicating substances; or any combination thereof. Cannabis, now legal for adults 21+ in Minnesota, still cannot be consumed and then driven while impaired. The question is what 'impairment' means for cannabis; (2) The evolving legal standard: unlike Colorado (which has a 5 ng/mL THC permissible inference in blood) or Wisconsin (zero-tolerance per se), Minnesota's post-legalization DWI standard for cannabis has been evolving. Minnesota law originally had a per se provision for any scheduled substance in the body, but the 2023 legalization law adjusted these provisions to accommodate lawful cannabis use — creating an impairment-based rather than per se based standard for cannabis DWI analysis. Defense counsel should review current statutory language given the rapid evolution; (3) Drug Recognition Expert (DRE) evaluation: in cannabis DWI cases, Minnesota law enforcement relies on Drug Recognition Expert evaluations — a 12-step protocol for evaluating impairment from drugs other than alcohol. DRE testimony about observed impairment signs is a primary prosecution tool in cannabis DWI cases; (4) Blood testing: to test for THC in blood, Minnesota law enforcement typically obtains a warrant for a blood draw. Blood THC concentration is analyzed by the BCA (Bureau of Criminal Apprehension) laboratory. The timing of the blood draw relative to cannabis consumption affects the reading; (5) Practical implication: legal cannabis use in Minnesota does not provide a defense to driving while actually impaired. A Minnesota driver who consumed legal cannabis and drives while impaired faces DWI charges. The challenge for prosecutors and defense attorneys is that the scientific correlation between blood THC levels and impairment remains contested — which may create stronger defense opportunities for cannabis DWI than for alcohol DWI.

DUI & Traffic Laws in Minnesota (2026)

Minnesota DUI & Traffic Violations: evidence timing, the review moments that actually change outcomes, and the next review point worth slowing down for

Useful dui & traffic violations guidance for Minnesota focused on dashcam preservation, stop record, records that matter, and how to avoid avoidable early damage.

Reviewed January 2026 2 min read Official-source grounded Ver en Espanol En Español

Key Takeaways

DWI 4 degrees: 4th (1st offense no aggravating factors, misdemeanor, 90days/$1K) → 3rd (1 aggravating factor or .16%+, gross misdemeanor) → 2nd (2+ factors) → 1st (3+ factors or 4th DWI in 10yr, FELONY 7yr/$14K); aggravating factors: .16%+, breath test refusal, child under 16, prior DWI/revocation in 10yr
CRIMINAL TEST REFUSAL (§ 169A.20(2)): refusing BREATH test = same criminal degree as underlying DWI offense; after Thompson (886 N.W.2d 224, Minn. 2016) / Birchfield: blood draw refusal NOT criminal (warrant required for blood); no 'refuse and face civil-only' option for breath
Whiskey plates (§ 169A.60): repeat DWI = license plates replaced with 'W' prefix plates; alert to all traffic officers; applies to VEHICLE (not just driver — household members drive with W plates too); forfeiture possible for 1st Degree felony DWI
1st offense 4th Degree: typically stayed sentence + probation; 90-day administrative revocation; IID if .16%+ or refusal or prior; no plate impoundment; SR-22 for 3 years on reinstatement; .16%+ on first offense = 3rd Degree gross misdemeanor instead
Cannabis DWI post-Aug 2023: impairment-based standard (not per se ng/mL like CO); DRE evaluations primary tool; blood warrant required for THC testing; per se provision adjusted by 2023 legalization law; standard still evolving in courts

Key Numbers — Minnesota All 50 states →

Filing Deadline 2 years

Fault Rule Modified Comparative

Insurance System No-Fault

Key Statute Minn. Stat. § 541.07

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Minnesota's DWI enforcement has a provision that no other neighboring state replicates: criminal test refusal. Under Minn. Stat. § 169A.20(2), it is a crime — not merely a civil infraction — to refuse to submit to a chemical test after a lawful DWI arrest. The degree of criminal liability for test refusal is the same as the degree of DWI offense the driver would have faced had they taken the test. If the circumstances of the arrest (prior DWI history, aggravating factors) would have made the DWI a 3rd Degree DWI (a gross misdemeanor), refusing the test is also a 3rd Degree DWI. If the underlying DWI would have been a 1st Degree felony, refusing is a 1st Degree felony. The criminal test refusal law creates a genuine coercive dynamic: a Minnesota DWI suspect faces criminal consequences whether they take the test OR refuse it — eliminating the usual calculation where a driver might refuse hoping to make the DWI case harder to prove. However, the U.S. Supreme Court's Birchfield v. North Dakota (2016) and the Minnesota Supreme Court's subsequent State v. Thompson, 886 N.W.2d 224 (Minn. 2016), limited criminal refusal to breath tests only — warrantless BLOOD draws require consent or a warrant (not just implied consent), and refusing a blood draw cannot be criminally punished under the Fourth Amendment.

Minnesota's "whiskey plates" — the distinctive white license plates beginning with the letter "W" — are one of the most visible aspects of Minnesota's DWI response framework. License plate impoundment (Minn. Stat. § 169A.60) allows police to seize the regular license plates from vehicles operated by DWI-convicted drivers in enhanced circumstances (second DWI within 10 years, or higher). The driver's vehicle receives "W" plates that alert other drivers and police to the owner's DWI history — creating a distinctive visual signal. Drivers with whiskey plates who are stopped by police face immediate attention and scrutiny. The whiskey plate system is unique to Minnesota's DWI enforcement culture and is not replicated in Wisconsin, Iowa, or other border states.

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