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 Missouri DWI and Ignition Interlock Laws

According to Missouri DWI laws, your license can be suspended in two different ways after an arrest for driving under the influence.

Administrative Per Se Law: This happens if you fail a breath test, or refuse to take one. You have 15 days from the date of arrest to file a written request for an administrative hearing. If you do not request a hearing, or if it is unsuccessful, you must begin a suspension period which varies according to your prior record of offenses.

DWI Conviction:  This occurs when you are sentenced by a court after a trial or plea agreement.  You must deal with both suspensions in order to regain your driving privileges.

Missouri ignition interlock laws require that anyone convicted of a second or subsequent DWI offense must install an ignition interlock device (also known as an in car breathalyzer).  The interlock must include an electronic log device, on every vehicle you own or which is registered to you.

Get your license back in Missouri after a DWI

How do I get an interlock license?

  • Complete and submit the Request for Immediate 90-Day Restricted Driving Privilege form within 15 days of the date you receive the Notice of Suspension or Revocation of your Driving Privilege. The request form is contained on the notice that was mailed to you, or you may use the Request for Immediate 90-Day Restricted Driving Privilege with an Ignition Interlock Device (Form 5489).

  • Mail your request to: Driver License Bureau PO Box 3700 Jefferson City, MO 65105-3700or fax to: (573) 526-3452

  • Call LifeSafer Ignition Interlock at 800-634-3077 to schedule your ignition interlock installation. Ask about discounts and special offers.

  • Once installed, LifeSafer will notify DOR that you have an interlock.

  • Call your insurance company and ask for an SR22 proof of insurance form and file with Missouri Driver License Bureau, PO Box 200, Jefferson City, MO 65105-0200.

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