Missouri ignition interlock device laws

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State of Missouri:

Intoxalock Legacy

Intoxalock eLERT

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What to do after getting a DWI can be confusing. Intoxalock is here to help. We have over 20 years of experience helping people just like you install an ignition interlock in Missouri and get back on the road.

Don’t let the thought of installing a ignition interlock (BAIID, IID, car breathalyzer or interlock system) intimidate you. Our law specialists will answer all of your ignition interlock questions and walk you through Missouri State requirements and laws, help you find a local authorized service center and schedule an installation conveniently nearby, to regain your license as quickly as possible. 

Intoxalock ignition interlock device benefits in Missouri:

• New lower pricing and no activation fee*
• Largest ignition interlock device service center network in Missouri
• FREE shipping on leases six months or longer
• 24/7 customer service support
• Affordable ignition interlock pricing
• Over 1,800 convenient locations nationwide
• The fastest way to get back on the road legally in MO

Additional drunk driving resources:

Home alcohol monitoring
Help a friend

Find an attorney
Find treatment center 
State of Missouri website

State of Missouri ignition interlock & drunk driving laws:

Missouri ignition interlock
brochure (PDF)

First Offense DWI

If you were convicted of a first offense DWI in Missouri, your license will be suspended. You can continue driving by obtaining a Restricted Driving Privilege (RDP). To receive an immediate 90-day RDP, you must install an ignition interlock device and provide proof of insurance. You also have the option of serving a 30-day suspension period before obtaining a 60-day RDP. If you choose this option, you still must install an ignition interlock device and show proof of insurance before regaining driving privileges.

Second Offense DWI

If you were convicted of a second offense DWI in Missouri, your license will be suspended for one year. However, you may still regain your Limited Driving Privilege (LDP) with the installation of an Intoxalock ignition interlock device (BAIID, IID or interlock system) during your suspension.

In order to apply for your LDP you must:

• Serve 30 days of your license suspension
• Complete and submit an Application for Limited Driving Privilege, Form 4595
• Provide proof of SR-22 insurance to the Department of Revenue
• Install an Intoxalock Legacy ignition interlock device (BAIID, IID or interlock system)and provide proof on installation on any vehicle you operate

If your second offense is within five years of your prior offense, you will be subject to a five year denial on your record. You must petition the circuit court for a LDP and follow the required steps, including the installation of an ignition interlock device.

In order to reinstate your full driving privileges after suspension, you must:

• Submit a Substance Abuse Traffic Offender Program (SATOP) completion form or comparable program
• Pay a $45 reinstatement fee by phone, cashier's check, money order or personal check to the Missouri Department of Revenue. You must include your full name, address, date of birth and driver's license number with payment
• Proof of SR-22 insurance, which must be maintained for two years from the date your suspension began
• Install an Intoxalock ignition interlock device (BAIID, IID or interlock system) and provide proof of installation on any vehicle you operate for six months

Third & Subsequent Offenses DWI

If you were convicted of a third DWI offense or more in Missouri your license will be subject to a ten year denial. You must petition the circuit court for an Limited Driving Privilege (LDP) and follow the steps required, if you have an active five or ten year denial on your record.

In order to reinstate your full driving privileges after suspension, you must:

• Submit a Substance Abuse Traffic Offender Program (SATOP) completion form or comparable program
• Pay a $45 reinstatement fee by phone, cashier's check, money order or personal check to the Missouri Department of Revenue. You must include your full name, address, date of birth and driver's license number with payment
• Proof of SR-22 insurance, which must be maintained for two years from the date your suspension began
• Install an Intoxalock ignition interlock device (BAIID, IID or interlock system)and provide proof of installation on any vehicle you operate for six months

Denial on Record

In order to apply for your Limited Driving Privilege (LDP) you must file a petition with the circuit court in the county where you live or work and then complete the following:

• Serve 30 days of your license suspension
• Pay a filing fee and court costs for your petition
• Seek legal advice, if you wish
• Provide proof of SR-22 insurance to the Department of Revenue
• Install an Intoxalock ignition interlock device (BAIID, IID or interlock system) and provide proof on installation on any vehicle you operate

If the court grants your LDP, you will be given an Order Granting Limited Driving Privilege and this will be your "driving document". The Department of Revenue must have a copy of this document on file.

*Valid for all leases signed after 1/1/16. Cannot be combined with any other offer. Not valid on voluntary leases.

This information is provided as a guideline only. Each case will vary.