Skip the auto shop - Our mechanics make house calls

Windshield Laws in Missouri

Windshield Laws in Missouri

If you drive on the roadways in Missouri, you already know you are required to follow the myriad traffic rules to do so safely and legally. In addition to those rules motorists are also required to make sure that their vehicles meet the windshield safety standards. In Missouri, failing to follow the below windshield laws will not only result in possible fines if you are stopped by law enforcement, your vehicle may not pass the required inspection that vehicles must undergo before being registered.

Windshield requirements

Missouri has the following requirements for windshields and devices:

  • All vehicles are required to have windshields that are attached properly and in an upright position.

  • All vehicles must have working windshield wipers with blades that are free from tears and other damage. Additionally, the wiper arms must ensure complete contact with the surface of the windshield.

  • The windshields and windows on all vehicles manufactured after 1936 must be made of safety glazing material or safety glass, which is manufactured in a way that drastically reduces the possibility of flying or shattering glass if it is struck or involved in an accident.


  • Vehicles cannot have posters, signs or other nontransparent materials on or in the windshield or other windows that obstruct the driver’s view.

  • Only required inspection stickers and certificates may be affixed to the windshield.

Window tint

Missouri allows window tint that complies with the following:

  • Tint on the windshield must be non-reflective and is only permitted above the AS-1 manufacturer line.

  • Tint on front side windows must allow over 35% light transmittance.

  • Reflective tint on the front and back side windows cannot reflect more than 35%

Chips, cracks and defects

Missouri also requires that all vehicle windshields allow clear views of the roadway and intersecting roadways. The regulations concerning cracks, chips and other defects are as follows:

  • Windshields cannot have any areas of breakage that are shattered, have missing pieces or have sharp edges.

  • Any star type breaks, which are those that have a point of impact surrounded by radiating cracks, are not permitted.

  • Half-moon and bull’s eye chips in the glass that are within three inches of another area of damage and within the driver’s viewing area are not permitted.

  • Any cracks, chips or areas of discoloration that are located within an area four inches above the bottom of the windshield and within the swipe of the windshield wipers in the driver’s view are not permitted.

  • Any chips, bull’s eye or half-moon chips that are larger than two inches in diameter are not permitted anywhere on the windshield.

  • No cracks longer than three inches are permitted within the swipe area of the windshield wipers.


Failing to comply with the above laws will result in fines that are determined by the county and the vehicle not passing inspection for registration.

If your windshield needs to be inspected or your wipers are not working properly, a certified technician, such as one from YourMechanic, can help you get back on the road safely and quickly so you are driving within the laws.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


Post a question and get free advice from our certified mechanics.


More related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed Related Trouble Codes: P2441: EVAP Vent Valve Stuck Open EVAP trouble...

Related questions

Q: How do you defog or defrost the windows?

Your Accord includes both a front and rear defogger/defroster. Whether your windshield is fogging up on a rainy day, or your rear glass is covered by frost, using both systems is easy. Here’s what you need to do: Front Defogger/Defroster...

Q: dirty windshield & grill after a road trip

Although bird droppings and smashed highway bugs might not seam like a big deal, it can do end up doing serious damage to the paint of the car costing hundreds of dollars in repairs. Because bugs and bird droppings do...

Q: Is My Car’s Cracked Windshield Safe?

Your car's windshield is a part of the structural support system for the roof of your car. The windshield also provides additional strength to the safety cell that is the passenger compartment. Windshields that are intact provide more rollover protection...