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Utah Modified Vehicle Laws & Requirements



The Utah Code (UC) governs the state's street legal laws.

UC Title 41


All vehicles driven in Utah are restricted to a maximum width of 102 inches, a maximum height of 14 feet, and a single vehicle length limit of 45 feet.

UC 72-7-402


All vehicle tires must be safe and without any bulges or exposed cords. Utah requires a minimum tire tread depth of 1/16 inch. Tire grooving is not covered in the code.

UC 41-6A-1636


Rear tires must have the top 50% of the tire covered by mud flaps, fenders or the vehicle body construction. Rear mud flaps are must be directly aligned with the tire and at least as wide as the tire. 


Wheel spacers are prohibited in Utah.

UC 41-6A-1636


Utah requires vehicles to have brakes capable of stopping the vehicle from a speed of 20 mph within 40 feet. A secondary, mechanical, parking brake is also required.

UC 41-6A-1630


Steering systems are not covered in Utah's code.

UC 41-6A-1623


It is unlawful to install lift blocks on the front suspension of a vehicle driven in Utah. Any suspension lift blocks installed on the rear of a vehicle must be made of one piece.

UC 41-6A-1630

Frame & Undercarriage Height

See Additional Detailed Information in the “PLT Safety Inspection Manual”

Utah has a vehicle frame height limit law based on the vehicle's GVWR. In addition, the lowest portion of the vehicle's floor cannot be more than 3 inches above the top of the frame.

Vehicle GVWR

Under 4,500

4,500 to 7,499

7,500 and over

Max. Frame Height

24 inches

26 inches

28 inches

( Measured to the bottom of the frame. )

UC 41-6A-1631


Bumpers are required in Utah. All bumpers must be at least 4.5 inches tall.

UC 41-6A-162


If a vehicle's track-width has been modified, Utah requires that fenders and mud flaps be extended to cover the full width of the tires.

UC 41-6A-1631

UC 41-6A-1633


It is not clear if Utah's street legal laws allow auxiliary lights to be installed in addition to headlights and tail lights.



Tail lights

Spot lights


2 min.

2 min.

2 max.

Min. Height

15 inches

15 inches


Max. Height




( Measured to the center of the light. )

UC 41-6A-1604

UC 41-6A-1610

Light Colors

Must align with lighting colors laid out in the chat in the “PLT Safety Inspection Manual”


The laws in Utah do not indicate whether or not windshields are required. Vehicles with windshields must, however, be equipped with windshield wipers.

UC 41-6A-1635


See Additional Detailed Information in the “PLT Safety Inspection Manual”

Tinting, or non-transparent material added to the window(s) to the immediate left or right of the drivers’ seat is illegal if it allows less than 43% light transmittance. (Front left/right windows). The right side mirror cannot be missing when any window is tinted. Window tint on windows behind driver can be as dark as desired.


In Utah, mufflers are required equipment. Exhaust cutouts are prohibited.

UC 41-6A-1626


It is unclear whether or not Utah has any engine swap or engine performance modification rules.


Only Davis, Salt Lake, and Weber counties currently require emissions testing in Utah.

Vehicle Registration Requirements

Any OHV (ATV, UTV, motorcycle or snowmobile) must display a current OHV registration sticker. Most non-resident OHV operators are required to purchase a Non-resident OHV Permit for each ATV, UTV, OHM and snowmobile they bring into the state. These permits are available from vendors located near popular OHV destinations and online. A complete list of vendors is available from Utah State Parks and Recreation office. Learn more about OHV registration in Utah

Street Legal OHV Requirements

Both Type I and Type II ATVs may be motified to become street legal and operate on designated public highways. For further information on the requirements, visit the Utah Highway Patrol website.

Nonresident Street Legal Requirements

A non resident operator who is authorized on highways in another state can operate as a street legal ATV in Utah, only if that state reciprocates a Utah street legal ATV on the other state’s highways.  The non resident operator, who is reciprocal to Utah, will need to have Utah’s required equipment before it can be operated as a street legal ATV.

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Utah Modified Vehicle Laws & Requirements | Dixie 4 Wheel Drive


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