Complete Guide to Vehicle Modification Laws in South Dakota
South Dakota offers vehicle modification enthusiasts a relatively permissive environment compared to many other states. The Mount Rushmore State takes a hands-off approach to most vehicle modifications, with minimal statutory restrictions on popular upgrades. This comprehensive guide breaks down the legal status of common vehicle modifications in South Dakota to help you customize your ride while staying compliant with state law.
Window Tint
Status: Conditional
South Dakota allows window tinting but with specific restrictions on front side windows, while rear windows enjoy much more freedom. Window Tint in South Dakota regulations strike a balance between privacy and safety requirements. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Underglow Lighting
Status: Conditional
Underglow is legal in South Dakota, including while driving, subject to color and flashing limits: Red visible from the front and blue anywhere are Class 2 misdemeanors, and no more than three auxiliary lamps may be used. See Underglow in South Dakota for the full breakdown. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Lift Kits
Status: Legal
Truck and SUV enthusiasts can rejoice – Lift Kits in South Dakota don't appear to face specific statutory restrictions. South Dakota gives you considerable freedom for suspension and body lift modifications. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Vehicle Lowering
Status: Legal
Lowering in South Dakota also appears to be legal with no specific statutes regulating vehicle lowering modifications. You can pursue lowering springs, air suspension systems, and static drops for improved aesthetics. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Light Bars & LED Lighting
Status: Conditional
South Dakota permits three auxiliary driving lamps but only if mounted 12 to 24 inches above the surface — a narrow window that a roof or upper-bumper bar cannot meet. No cover is required. See Light Bars & LED Lighting in South Dakota for the full breakdown. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Headlight & Taillight Tint
Status: Illegal
Smoked or tinted film on headlights and taillights is illegal in South Dakota. Headlights must emit white light and taillights must show red at the required visibility distance, and tint that dims or discolors them violates those requirements. See Headlight & Taillight Tint in South Dakota for the full breakdown. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Exhaust Modifications
Status: Conditional
South Dakota sets no statewide decibel limit for passenger cars. A muffler in good working order is required, exhaust may not produce excessive or unusual noise, and cutouts or bypasses are prohibited. See Exhaust Noise in South Dakota for the full breakdown. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Wheel & Tire Modifications
Status: Legal
Wheel & Tire Protrusion in South Dakota doesn't appear to face specific statutory restrictions. South Dakota allows for wide wheel and tire combinations that extend beyond fender lines. Get the exact limits, statute citations, and a printable PDF in your compliance report.
License Plate Frames
Status: Legal with Restrictions
License Plate Frames in South Dakota are legal as long as they do not obstruct the visibility of license plate information. Decorative frames are fine as long as all required information remains clearly visible. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Window Banners
Status: Conditional
No sunscreening device may obstruct or reduce the driver's clear view, and no film may extend below the AS-1 line or below the lowest point of the sun visor. Because the material must be transparent, a printed or opaque banner is not legal in South Dakota — only a clear tint band. See Window Banners in South Dakota for the full breakdown. Get the exact limits, statute citations, and a printable PDF in your compliance report.
Staying Compliant
While South Dakota's vehicle modification laws are generally permissive, modifications should not compromise vehicle safety or interfere with required safety equipment. Federal regulations may still apply to certain modifications, and local municipalities might have their own restrictions.
For a personalized compliance report with exact limits, statute citations, and a printable PDF you can keep in your glovebox, check out our compliance report.
Every figure in this guide was verified against primary sources — statute text, administrative code, and state inspection manuals — in August 2026. Laws change and local ordinances may add requirements beyond state law, so verify with local authorities before modifying your vehicle. This is not legal advice.