Are Kei Trucks Legal in South Dakota?

On the statute book, South Dakota looks straightforward. Title 32 of the South Dakota Codified Laws contains no mini-truck definition, no kei category and nothing that singles out a Japanese import. Section 32-3-1(17) defines a motor vehicle to include "motor trucks" and everything else propelled by power other than muscular power, with a short exceptions list — traction engines, road rollers, farm wagons, freight trailers, rail vehicles, electric bicycles, multi-passenger quadricycles and off-road vehicles. A Subaru Sambar is a motor truck and is on none of those exception lists.

The off-road vehicle exception is the one worth checking, because in several states it is how a kei truck ends up confined to a field. South Dakota defines an off-road vehicle at § 32-20-1(4) as a self-propelled vehicle "designed primarily to be operated on land other than a highway", including all-terrain vehicles, dune buggies, and any vehicle whose manufacturer's statement or certificate of origin says the vehicle is not for highway use. A kei truck was designed and type-approved for Japanese public roads and carries no origin document saying otherwise, so on the wording it is not an off-road vehicle in South Dakota.

The state's one reduced-standard on-road class is also closed. Section 32-3-1(11) defines a low-speed vehicle as a four-wheeled motor vehicle attaining more than twenty but not more than twenty-five miles per hour in one mile on a paved level surface, and § 32-3-71 adds the conditions: a low-speed vehicle that meets 49 C.F.R. § 571.500 "shall be issued a title", and "The manufacturer certificate of origin or vehicle title shall clearly identify the vehicle as a low-speed vehicle." A kei truck is faster than the class allows, is not built to FMVSS 500, and has no origin document identifying it as a low-speed vehicle, so it cannot be titled that way and does not need to be.

So why does this page say the position is not settled? Because reading a code is not the same as knowing what happens at a counter, and South Dakota has published nothing to bridge the gap. The Department of Revenue's motor vehicle section has standing pages for cars, trucks and vans, historic vehicles, low speed vehicles, off-road vehicles, rebuilt vehicles, motorcycles, trailers and manufactured homes — and none at all for a vehicle imported from outside the United States. Its own site search returns no results for "imported". Title 32 says nothing about Customs documents, foreign registration certificates or translations; where it uses the word "foreign", as at § 32-5-46, it means another US state, not another country. There is no equivalent of North Dakota's published imported-vehicle document list and no departmental bulletin we could locate.

Two things make that silence worth taking seriously rather than shrugging off. Titling and registration in South Dakota is handled by your county treasurer rather than by a single state counter, so practice can differ from one county to the next with nothing published to level it. And § 32-3-48 gives the secretary a broad power: if it appears that an applicant for a certificate of title or registration "is not entitled thereto", the secretary may refuse to issue a certificate or register the vehicle, with a hearing available afterwards under chapter 1-26. Nothing in the Code tells you in advance how a county treasurer will treat a Japanese export certificate as proof of ownership for a vehicle that has never held a US title. Until South Dakota publishes something, that is a question only the treasurer can answer.

What you can do in South Dakota

If you live in South Dakota, make one phone call before you make a payment. Ring your county treasurer's office and, separately, the Department of Revenue's motor vehicle division, and ask the narrow question: what will you accept as proof of ownership for a 1999 Japanese-built truck that has never been titled in the United States? Name the documents you will have — the Japanese export certificate with an English translation, the Customs entry paperwork, and an unbroken chain of bills of sale — and ask whether that set is enough. Ask for the answer by email.

Note the clock before you order anything. South Dakota requires a title to be updated within forty-five days of the date of purchase, charges a four percent motor vehicle excise tax on the purchase price, and applies a late title penalty of $1 for every week past the forty-five day grace period up to a $50 maximum. A truck that arrives at a port while you are still arguing about paperwork is a truck accruing interest and penalty, so the question is much better answered before the purchase date than after it.

If the answer turns out to be no, or if you cannot get a clear answer at all, a kei truck is still a genuinely useful machine on private ground — a ranch, a shelterbelt, a gravel pit, a hunting property. That is the fallback this site would rather you plan for in advance than discover after a wire transfer. What we will not do is tell you South Dakota registers these, because we have not found a South Dakota document that says so.

How this fits the national picture

Importing a vehicle twenty-five years or older is a federal matter and is settled. Registering one for the road is decided state by state, which is why the answer changes when you cross a line on a map. Our state-by-state guide covers all fifty, including why states disagree and the AAMVA guidance most restrictions trace back to.

We are based in Goshen, New York, and New York is one of the states that will not register these for road use. We say so on our own state's page because it is true, not because it helps us. We will not tell you a kei truck is street legal in the USA.

Common questions

Are kei trucks legal in South Dakota?

There is no South Dakota law banning kei trucks and no mini-truck classification in Title 32 at all. On the wording of the Codified Laws a kei truck is an ordinary motor truck. But South Dakota has published no guidance on titling or registering a vehicle imported from outside the United States, so we cannot tell you with confidence that a county treasurer will plate one.

Can you register a kei truck in South Dakota?

Nothing in the vehicle code stops it, but nothing published confirms it either. Titling runs through your county treasurer, who decides what proof of ownership to accept, and § 32-3-48 lets the secretary refuse a title or registration where an applicant is not entitled to one. Ask your county treasurer in writing before buying, and treat a verbal answer at a counter as provisional.

What is a mini-truck under South Dakota law?

South Dakota has not defined one. States such as Ohio, Nebraska and Indiana wrote a mini-truck or minitruck definition into their codes; South Dakota did not, so there is no special class, no engine-size threshold and no kei-specific speed or road restriction on the books.

Is a kei truck a low speed vehicle in South Dakota?

No. Section 32-3-1(11) caps a low-speed vehicle at twenty-five miles per hour attained in one mile, and § 32-3-71 requires the manufacturer certificate of origin or title to clearly identify the vehicle as a low-speed vehicle and the vehicle to meet 49 C.F.R. § 571.500. A kei truck meets none of those, so it is outside that class entirely.

Is a kei truck an off-road vehicle in South Dakota?

On the statutory wording, no. Section 32-20-1(4) defines an off-road vehicle as one designed primarily to be operated on land other than a highway, or whose certificate of origin states it is not for highway use. A kei truck was built for Japanese public roads and carries no such origin statement, so it does not fall into South Dakota's off-road vehicle class.

This page describes what we could establish from the source above on the date shown. It is not legal advice, and kei registration rules have moved in both directions every year since 2021 — confirm with the South Dakota registering authority before you buy. Payment for an imported vehicle is by bank transfer and is not reversible.